Sen. David Perdue, R-Ga., said Thursday that Senate Majority Leader Mitch McConnell’s new support for ending chain migration is a watershed moment for immigration reformers in Congress.

“When you have the majority leader of the Republican caucus say that he is in favor of ending chain migration, I think that’s a milestone,” Perdue said during a panel discussion at the National Press Club in Washington. “I think the mood in our caucus anyway is that ending chain migration is a top priority.”