Republican Sen. Jeff Flake – who has compared President Trump to a communist dictator who starved, imprisoned and murdered as many as 20 million people – says he fully expects Trump to face a Republican challenger in 2020, and his statements are causing some to suspect the challenger could be Flake himself.

MSNBC’s Kasie Hunt asked Flake during a Sunday broadcast if he believes Republicans have a moral duty to challenge Trump for the party’s nomination in 2020.

“I don’t want to put it that way, but I think he will have a challenge,” responded the Arizona senator, who announced earlier that he will not seek re-election to the Senate. “He’ll certainly have a challenge from somebody as an independent. But I think he’ll likely have a challenge in the Republican Party as well.

“I am not the only one — the only Republican who is saying, ‘You know, I’m not sure this is my party. We used to stand for limited government and free trade, free enterprise and not this kind of nationalist, protectionist kind of party.”