Washington (CNN) President Donald Trump sought to heighten the sense of urgency for his base Thursday when he told supporters that if he is impeached, "it's your fault, 'cause you didn't go out to vote."

Trump has discussed the prospect of being impeached before, but his comments come after a whirlwind week raised fresh questions about his fitness for office and control over his administration.

"You didn't go out to vote -- that's the only way it could happen," Trump said during a rally in Billings, Montana.

"I'll be the only President in history they'll say: 'What a job he's done! By the way, we're impeaching him,'" Trump said.

"This election, you aren't just voting for a candidate, you are voting for which party controls Congress," the President said. "Very important thing. Very important thing."