WASHINGTON — Former President George W. Bush says it looks like an immigration overhaul has a chance to pass Congress and he says its' important to fix "a broken system."

The Senate has passed legislation that combines the promise of citizenship for those living in the United States unlawfully with increased border security. But that approach seems to be a nonstarter in the GOP-led House.

Still, Bush tells ABC's "This Week" that it looks like lawmakers are making "some progress."

"I think it's very important to fix a broken system, to treat people with respect, and have confidence in our capacity to assimilate people," Bush said. "It's a very difficult bill to pass because there's a lotta moving parts. And the legislative process is -- can be ugly. And -- but it looks like they're making some progress."

Bush was unable to get an overhaul passed when he was president, a challenge the former president acknowledged as frustrating.

"I mean, I understand sometimes you get-- legislation through that you want," Bush said. "I was also frustrated we didn't pass social security reform. I thought the plan I'd laid out on both was reasonable. But sometime, it takes time for some of these complex issues to evolve. And, looks like immigration, you know, has a chance to pass."

Asked whether the GOP would suffer if immigration legislation died, Bush said the reason to pass it isn't to bolster the Republican Party but to fix the system.

He said, "Good policy yields good politics as far as I'm concerned."

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  • Former president George W. Bush, wipes a tear after his speech during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. Left is President George H.W. Bush. (AP Photo/David J. Phillip)

  • Former President George W. Bush, accompanied by his wife former first lady Laura Bush, flashes the "W" sign after his speech during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • From left, former President Bill Clinton, his wife, former first lady and former Secretary of State Hillary Rodham Clinton, former President Jimmy Carter, and his wife, former first lady Rosalynn Carter listen during the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)

  • Former president George W. Bush speaks during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former president George W. Bush speaks during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former president George W. Bush waves with his wife Laura speech during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former President George W. Bush, center, shares a laugh with his wife, former first lady Laura Bush and father, former President George H.W. Bush during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former President George H.W. Bush wears pink socks as he is seated in a wheelchair with, from left, first lady Michelle Obama, President Barack Obama, former first lady Barbara Bush, and former President George W. Bush, at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas on Thursday, April 25, 2013. (AP Photo/Charles Dharapak)

  • President Barack Obama and First Lady Michelle Obama watch as former first lady Barbara Bush gives the thumbs up to guests during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • President Barack Obama laughs as he sits between his wife, first lady Michelle Obama and former first lady Barbara Bush after his speech during the dedication of the George W. Bush presidential library on Thursday April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • President Barack Obama laughs with former first lady Barbara Bush during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former President George W. Bush, right, talks with his father, former President George H.W. Bush during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former President George W. Bush waves after speaking at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. From left are, first lady Michelle Obama, President Barack Obama, and his mother, former first lady Barbara Bush, and his wife, former first lady Laura Bush. (AP Photo/Charles Dharapak)

  • Former president George W. Bush, left, shakes hands with former president William J. Clinton during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Former president George W. Bush, left, shakes hands with former president William J. Clinton during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • President Barack Obama speaks during the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. Seated, from left are, former first lady Barbara Bush, former President George H.W. Bush, former President George W. Bush, and his wife, former first lady Laura Bush. (AP Photo/Charles Dharapak)

  • From left, President Barack Obama, former president George W. Bush, former president William J. Clinton former President George H.W. Bush and former president Jimmy Carter arrive for the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • From left, President Barack Obama, former first lady Barbara Bush, President George H.W. Bush, former first lady Laura Bush, former president William J. Clinton, former first lady Hillary Clinton and former president Jimmy Carter applaud former president George W. Bush during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • President Barack Obama embraces former President George W. Bush after he spoke at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)

  • From left, First Lady Michelle Obama, former first lady Laura Bush, former first lady Hillary Clinton, former first lady Barbara Bush, former first lady Rosalynn Carter arrive for the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • From left, President Barack Obama, former first lady Barbara Bush, former president George H.W. Bush and Laura Bush applaud former president George W. Bush after his speech during the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • First lady Michelle Obama, left, stands with, from second from left, former first ladies: Laura Bush; Hillary Rodham Clinton; Barbara Bush; and Rosalynn Carter; at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)

  • From left, First Lady Michelle Obama, former first lady Laura Bush, former first lady Hillary Clinton, former first lady Barbara Bush and former first lady Rosalynn Carter arrive for the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • From left, President Barack Obama, former president George W. Bush, former president William J. Clinton former President George H.W. Bush and former president Jimmy Carter arrive for the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • Speaker of the House of Representatives John Boehner (R-Ohio) arrives for the dedication of the George W. Bush presidential library on Thursday, April 25, 2013, in Dallas. (AP Photo/David J. Phillip)

  • New Jersey Gov. Chris Christie (R) and wife Mary Pat arrive at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)

  • Republican strategist and former White House senior adviser Karl Rove arrives at the dedication of the George W. Bush presidential library on the campus of Southern Methodist University in Dallas, Thursday, April 25, 2013. (AP Photo/Charles Dharapak)