Donohue told a crowd last month that "if the Republicans don't do it they shouldn't bother to run a candidate in 2016. I mean, think about that. Think about who the voters are."
McCain, despite co-authoring the immigration reform bill in the 2006-2007 push, lost two-thirds of Hispanic voters to Barack Obama in the 2008 presidential contest. After turning sharply against reform ahead of his 2010 reelection bid, he went on to become a leading author of the sweeping immigration legislation that passed the Senate in June 2013. House Republicans have vowed not to bring it up.