Rep. Justin Amash (R-Mich.) on Tuesday said he would not rule out a third-party challenge to President Trump in 2020.

The Hill asked Amash if he is thinking about leaving the Republican Party to run for president as the Libertarian Party candidate.

“I’m just focused on defending the Constitution, it’s not something I’ve thought about,” Amash said. “I don’t take things off the table like that, but it’s not something at the forefront of my considerations right now, I’m just focused on my job. I wouldn’t take running for governor off the table or Senate or state house, I don’t take things off the table.”