WaPo:

The Libertarian Party is planning to nominate a candidate for president on May 25 at its convention in Austin, but no well-known figures have entered the race. Former Rhode Island governor Lincoln Chafee, who joined the party last year, abandoned a bid for the nomination this month. Former Massachusetts governor Bill Weld, the party’s 2016 nominee for vice president, returned to the Republican Party this year to run a protest campaign against Trump. Weld ended his campaign last month.

Amash, a vocal critic of Trump, voted for the president’s impeachment last year and has repeatedly declined to rule out a White House run.

“Is there any better time to have a president who might be not from either party?” he asked reporter Declan Garvey in January.