A key Republican lawmaker has threatened to go on trial if Donald J. Trump is removed from office for obstructing justice.

Sen. John Cornyn, R-Texas, said in a tweet that if the president does not step down, he plans to hold a news conference on Jan. 10 to “ask the people of the United States why they should support impeachment proceedings against the president.”

Cornyn’s threat is a reference to the president’s threat to impeach his Democratic successor, former Vice President Joe Biden, if he was not removed from power.

Cornyn also suggested that impeachment proceedings could take place “in the middle of the night,” adding, “this will be the most embarrassing episode in American history.”

Cornulano, a senior member of the House Judiciary Committee, is the chairman of the panel that oversees the Senate Judiciary Committee.

He is also a member of Trump’s own Judiciary Committee and a member who has been critical of the president.

Cornulino and Cornyn are both Democrats.

Trump has repeatedly suggested that Cornyn would be “a great senator” if he were to take a stand against the impeachment threat.

He told Fox News on Friday that Cornulano was “one of the great people that ever ran for office in our country.”

“John Cornyn is one of the greatest people I’ve ever met,” Trump said.

“He’s been a very strong guy and very intelligent.

And he’ll be very smart in terms of doing what’s right for the country and he’ll do it.”