Jeff Daniels doubled down on his criticism of Donald Trump on Thursday night as he accused the president of completely soiling the Oval Office.

The actor, who is currently appearing as Atticus Finch in the Broadway production of Harper Lees novel To Kill a Mockingbird , also issued an ultimatum to Republicans .

Its time to get off the fence, Daniels declared to MSNBC s Lawrence ODonnell .

There were Republicans out there who were ashamed of whats going on with the Trump administration, Daniels claimed.

The fact that this guy, this president has completely soiled the Oval Office, soiled the presidency. And youve got a lot of people, and I keep looking at them, I go, When is enough enough? Have we tripped it yet? he asked.

Youre on the Titanic, and after Mueller spoke the other day, the iceberg came a little closer, added Daniels, as he appeared to encourage Republicans to show a little courage and follow in the footsteps of Rep. Justin Amash (R-Mich.), who earlier this month became the first GOP member of Congress to call for Trumps impeachment .

Daniels last week predicted the end of democracy if Trump wins reelection in 2020.

Check out the clip above.