Senate Minority Leader Mitch McConnell (R-Ky.) has been hit with an ethics complaint after a leaked tape revealed he was discussing with aides how to take on potential opponent Ashley Judd.

The Citizens for Responsibility and Ethics in Washington (CREW) has asked the Senate ethics committee and the FBI to investigate whether McConnell was having a discussion about potential Judd weaknesses -- including her mental health and religion -- on government time.

“Using taxpayer-funded resources to pay staffers to dig up dirt on political opponents isn’t just an ethics violation, it’s a federal crime,” said CREW Executive Director Melanie Sloan. “As Sen. McConnell requested, the FBI is investigating the recording. A thorough and fair investigation necessitates the bureau also inquire into whether Sen. McConnell himself violated the law.”

Mother Jones first reported on the leaked tape, which was reportedly recorded at a Feb. 2 meeting. Shortly after the leak, the McConnell campaign said it was working with the FBI.

"Obviously a recording device of some kind was placed in Senator McConnell's campaign office without consent," McConnell campaign manager Jesse Benton said in a statement.

Benton went on to slam the recordings as "Gestapo kind of scare tactics" during an interview on Mike Huckabee's radio show.

"We’re not going to stand for it," Benton said.

Judd announced on March 27 she would not challenge McConnell in 2014.

It's common for Senate and House aides to do campaign work on their own time, and it's legal to do so as long as no government resources are used.

This post has been updated to clarify that government staffers are allowed to volunteer in their spare time.

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  • The American Conservative Union's 2012 Rankings

    On Feb. 21, 2013, <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">The American Conservative Union</a> released its 2012 conservative ratings guide. Which members of Congress had a perfect score?

  • Sen. Ron Johnson (R-Wis.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Jon Kyl (R-Ariz.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Mike Lee (R-Utah)

    (Photo by Chip Somodevilla/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Mitch McConnell (R-Ky.)

    Andrew Harrer/Bloomberg via Getty Images <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Rand Paul (R-Ky.)

    (Photo by Brendan Hoffman/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Marco Rubio (R-Fla.)

    (SAUL LOEB/AFP/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Sen. Pat Toomey (R-Pa.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Michele Bachmann (R-Minn.)

    (MANDEL NGAN/AFP/GettyImages) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Diane Black (R-Tenn.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Marsha Blackburn (R-Tenn.)

    (Photo by Mark Wilson/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Paul Broun (R-Ga.)

    (Photo By Douglas Graham/Roll Call/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Dan Burton (R-Ind.)

    (Photo by Alex Wong/Getty Images) <em><a href="http://www.huffingtonpost.com/2012/01/31/dan-burton-retirement-indiana-gop_n_1244141.html">Editor's note:</a> Burton retired from Congress in January 2012</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Jeff Flake (R-Ariz.)

    (Photo By Bill Clark/CQ Roll Call) <em><a href="http://www.huffingtonpost.com/2012/11/07/jeff-flake-election-results-2012_n_2049514.html">Editor's note:</a> Flake became a U.S. senator in Jan. 2013</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Mike Conaway (R-Texas)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Jeff Duncan (R-S.C.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. John Fleming (R-La.)

    (Photo By Bill Clark/Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Bill Flores (R-Texas)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Trent Franks (R-Ariz.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Scott Garrett (R-N.J.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Trey Gowdy (R-S.C.)

    (Photo by Chris Maddaloni/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Tom Graves (R-Ga.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Wally Herger (R-Calif.)

    (Photo By Tom Williams/Roll Call) <em><a href="http://www.huffingtonpost.com/2012/01/10/wally-harger-retirement-california-republican_n_1197156.html">Editor's note:</a> Herger retired from Congress in January 2012.</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Duncan Hunter (R-Calif.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Lynn Jenkins (R-Kan.)

    (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Jim Jordan (R-Ohio)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Jeff Landry (R-La.)

    (Photo By Tom Williams/CQ Roll Call) <em><a href="http://www.huffingtonpost.com/2012/12/09/charles-boustany-wins_n_2267276.html">Editor's note:</a> Landry was defeated by fellow Republican Charles Boustany in Dec. 2012's special election.</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Randy Neugebauer (R-Texas)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Pete Olson (R-Texas)

    (Photo By Bill Clark/Roll Call via Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Mike Pompeo (R-Kan.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Bill Posey (R-Fla.)

    (Photo By Bill Clark/Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Tom Price (R-Ga.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Ben Quayle (R-Ariz.)

    (Photo By Bill Clark/CQ Roll Call) <em><a href="http://www.huffingtonpost.com/2012/08/29/david-schweikert_n_1838371.html">Editor's note:</a> Quayle was defeated by David Schweikert in the Republican primary for Arizona's 6th congressional district.</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Ed Royce (R-Calif.)

    (Photo by Scott J. Ferrell/Congressional Quarterly/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Steve Scalise (R-La.)

    (Photo by Bill Clark/Getty Images) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. David Schweikert (R-Ariz.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Tim Scott (R-S.C.)

    (Photo By Bill Clark/CQ Roll Call) <em><a href="http://www.huffingtonpost.com/2012/12/17/tim-scott-senate_n_2315830.html">Editor's note:</a> Scott was appointed U.S. Senator by S.C. Gov Nikki Haley in Dec. 2012, taking the seat of Jim DeMint.</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Cliff Stearns (R-Fla.)

    (Photo By Bill Clark/CQ Roll Call) <em><a href="http://www.huffingtonpost.com/2012/08/15/cliff-stearns-planned-parenthood-reelection_n_1777602.html">Editor's Note:</a> Stearns lost the Aug. 2012 GOP primary to retain his House seat.</em> <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Marlin Stutzman (R-Ind.)

    (Photo By Tom Williams/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Lynn Westmoreland (R-Ga.)

    (Photo By Bill Clark/Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Joe Wilson (R-S.C.)

    (Photo By Bill Clark/CQ Roll Call) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>

  • Rep. Todd Rokita (R-Ind.)

    (AP Photo/Michael Conroy) <a href="http://hosted-p0.vresp.com/1174985/8b2d5dc5f6/ARCHIVE">Source: American Conservative Union 2012 Rankings </a>