When Julian Castro spoke at the Democratic National Convention on Tuesday, not only did he bring down the house with his story of realizing the American dream, he lit up Twitter with his curiously familiar looks. And, no, it wasn't his twin brother people were mistaking him for. As Michael Ian Black succinctly put it, "Julian Castro looks like the Latino Jimmy Fallon." And from pretty much that moment on, no one could see anything else.

So it stands to reason that Fallon would have to take an impression of the San Antonio mayor out for a spin on Wednesday's show, and it did not disappoint. We're counting down the seconds until Castro and his brother Joaquin make an appearance alongside their "Late Night" doppelganger.

Watch Fallon's impression above and check out some of our other favorite political impressions below.

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  • Amy Poehler As Hillary Clinton

    Good thing Amy looks dazzling in all those pastel suits.

  • Tina Fey As Sarah Palin

    Is this hilarious? You betcha!

  • Will Ferrell As George W. Bush

    Big thanks to Ferrell and the "SNL" writers for inventing the word "Strategery."

  • Vaughn Meader As John F. Kennedy

    Close your eyes and it is exactly JFK!

  • John Belushi As Henry Kissinger

    Find out both the high point and low point of Kissinger's time as secretary of state.

  • Dana Carvey As George H.W. Bush

    Before Will Ferrell became the most recognized Bush on "SNL," Dana Carvey reigned.

  • Mike Tyson As Herman Cain

    While Kenan Thompson certainly delivers on "SNL," you can't beat Mike Tyson's portrayal of comedy's favorite GOP candidiate of the year.

  • Chris Farley As Newt Gingrich

    If only we could see Farley's 2012 Gingrich impression. RIP.

  • Chevy Chase As Gerald Ford

    This is also a good reminder of how attractive Chevy Chase used to be.

  • Phil Hartman As Ronald Reagan

  • David Frye As Richard Nixon

    Frye made a career out of this spot-on impression. <a href="http://snl.jt.org/imp.php?i=11" target="_hplink">Dan Aykroyd's Nixon </a>wasn't bad either.

  • Jon Lovitz As Michael Dukakis

    Just wait until the end.

  • Darrell Hammond As Bill Clinton

    The lip bite seals the deal.

  • Fred Armisen As Barack Obama

    We have to give Armisen some credit for attempting to do <a href="http://www.nbc.com/saturday-night-live/video/cosby-obama/1386282" target="_hplink">his Bill Cosby impression</a> on top of his Obama impression.

  • Andy Samberg As Rahm Emanuel

    "Are you ready to let the part of you that's human die?"

  • Jay Pharaoh: President Obama

    Perhaps this "SNL" newcomer can do Obama's next four years.

  • Dana Carvey As Ross Perot

    Who could forget this classic?

  • Dan Aykroyd As Jimmy Carter

    Carter has all the answers.

  • Will Ferrell As Janet Reno

    Next to his Dubya, this is the best.

  • Darrell Hammond As Dick Cheney

    The winks are what truly make the impression work.

  • Norm MacDonald As Bob Dole

    These are the times when Norm's monotone whining really comes in handy.

  • Kristen Wiig As Michele Bachmann

    No one captures that wide-eyed, empty stare quite like she does.

  • Jason Sudeikis As Joe Biden

    "When Americans chose Barack Obama, they also got me: Joe Biden."

  • Bill Hader As Rick Perry

    "I'm not gonna be President, am I?"

  • Fred Armisen As David Paterson

    The only place where this might not get a laugh? New Jersey!

  • Bill Hader As Eliot Spitzer

    Hader and Seth Meyers are understandably losing it for most of this sketch.

  • Kenan Thompson As Jimmy McMillan

    It may be hard to parody someone who's already a human caricature, but Kenan gives Jimmy McMillan the perfect send-up.

  • Jason Sudeikis As Rod Blagojevich

    How much hairspray do you think the stylist had to put on that wig?

  • Jordan Peele As Barack Obama (NSFW)

    We had to include just one more Obama impression, especially since half the credit belongs to Keegan-Michael Key as Luther, Obama's "anger translator."

  • Kristen Wiig As Nancy Pelosi

    "Re-runs of 'Touched By An Angel,' re-runs of 'Magnum P.I.' Now watch this, 'Millions Without Healthcare."

  • Phil Hartman As Bill Clinton

    We couldn't decide between Hartman or Hammond. Who could?

  • Al Franken As Henry Kissinger

    In this 1980 bit from a Grateful Dead concert movie, Franken's late comedy partner Tom Davis interviews his spot-on Kissinger impression.

  • James Adomian As George W. Bush

    Try telling us he doesn't give Will Ferrell a run for his money.

  • James Adomian As Jesse Ventura

    How is he not on "SNL" yet?

  • Darrell Hammond As John McCain

    "Barack Obama has fathered two black children in wedlock."

  • Jason Sudeikis As Mitt Romney

    Leave it to the best "straight man" on "SNL" to play the year's least eccentric GOP candidate.