Rep. Justin Amash Justin AmashCentrist Democrats 'strongly considering' discharge petition on GOP PPP bill On The Trail: How Nancy Pelosi could improbably become president History is on Edward Snowden's side: Now it's time to give him a full pardon MORE (I-Mich.) announced Tuesday that he has launched an exploratory committee to seek the Libertarian Party’s presidential nomination, his strongest indication yet that he will mount a third-party White House bid.

“Today, I launched an exploratory committee to seek the @LPNational’s nomination for president of the United States. Americans are ready for practical approaches based in humility and trust of the people,” Amash tweeted.

“We’re ready for a presidency that will restore respect for our Constitution and bring people together. I’m excited and honored to be taking these first steps toward serving Americans of every background as president,” he added.

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We’re ready for a presidency that will restore respect for our Constitution and bring people together. I’m excited and honored to be taking these first steps toward serving Americans of every background as president. — Justin Amash (@justinamash) April 29, 2020

The former Republican congressman has been toying for months with the prospect of waging a third-party campaign for the presidency and has come under an avalanche of pressure from Libertarians to throw his hat into the ring.

“He’d be acceptable to a lot of Libertarians, but also to a lot of those ‘Never Trump’ Republicans,” Joe Hunter, communications director for former New Mexico Gov. Gary Johnson Gary Earl JohnsonWhat the numbers say about Trump's chances at reelection Presidential race tightens in Minnesota as Trump plows resources into state The Hill's Campaign Report: Biden condemns violence, blames Trump for fomenting it l Bitter Mass. primaries reach the end l Super PAC spending set to explode MORE’s Libertarian presidential run in 2016, told The Hill this month. “Of all the candidates out there, he’s at the top of the list of those that can bring us to a tipping point, where a third party or independent candidate convinces the media and donors that he or she can be relevant and have an impact on the race.”

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Amash has centered his political career around libertarian values, advocating for less government intervention in daily life and sharp cuts in federal spending to offset an exploding deficit.

The Michigan lawmaker has seen his national profile soar under President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE with his vocal attacks against the White House. Last year, the Republican-turned-Independent said he would back Democrats in their impeachment effort.

Amash left the GOP last summer, accusing Republicans of abandoning fiscal conservatism and turning a blind eye to “misbehavior” to appease the president.

“This president will be in power for only a short time, but excusing his misbehavior will forever tarnish your name. To my Republican colleagues: Step outside your media and social bubble. History will not look kindly on disingenuous, frivolous, and false defenses of this man,” Amash said before supporting the House’s impeachment resolution in October.

His criticism has earned visceral rebukes from the GOP as well as a handful of Republican challengers in his House reelection campaign.

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While he would have to face off against other Libertarians to win the party’s 2020 nomination, he would by far be the most prominent third-party contender to run for the White House this cycle.

It is still unclear if Amash would draw more support away from Trump or former Vice President Joe Biden Joe BidenOmar fires back at Trump over rally remarks: 'This is my country' Trump mocks Biden appearance, mask use ahead of first debate Trump attacks Omar for criticizing US: 'How did you do where you came from?' MORE, the Democratic Party’s presumptive nominee.

“Trump has the Republican Party locked down, so any Republican at this point who is not voting for Trump is a potential Biden voter,” a GOP operative told The Hill earlier this month. “But if you’re a Republican who is just tired of the noise and you don’t necessarily agree with Biden on the issues and all of a sudden Justin Amash comes along, here’s a pretty attractive third-party option for you now.”