John Katko

Ten Republicans crossed President Trump on Wednesday and voted to impeach him for "incitement of insurrection."

Updated at 2 p.m. ET Wednesday

In a significant move, Rep. Liz Cheney, R-Wyo., chair of the House Republican Conference, said she will vote to impeach President Trump, making her the first member of House GOP leadership to announce publicly support of impeachment.

In a statement released Tuesday evening, Cheney described the violent mob that breached the U.S. Capitol on Jan. 6, causing destruction and death.

In response to President Trump's surprising firing Tuesday night of FBI Director James Comey, congressional Republicans largely maintained a united front and resisted calls for a special prosecutor to helm the ongoing investigation into Russia and the election.

However, cracks in that unity began to emerge in the day that followed, with key senators and some vulnerable House members voicing concern over how the White House handled Comey's dismissal.