Former president George W. Bush says he thinks lawmakers have made progress tackling immigration reform.

"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 in an interview broadcast Sunday on ABC's "This Week With George Stephanopoulos. "It's a very difficult bill to pass because there's a lot of moving parts.  And the legislative process can be ugly. But it looks like they're making some progress.

Bush, who tried but failed to pass reform as president, is expected to discuss immigration in remarks later this week.