On Sunday, Republican Senator Jeff Flake of Arizona said a member of the GOP should challenge Donald Trump in 2020. While on 'Meet the Press' Flake said, "I mean, it would be a tough go in a Republican primary. The Republican Party is the Trump party right now. But that's not to say it will stay that way.” Flake has announced he will not seek re-election in 2018, and acknowledged Sunday someone with his views would have difficulty surviving a GOP primary.