ASSOCIATED PRESS Then-presidential hopeful Mike Gravel answers a question during a debate at Dartmouth College in September 2007.

Mike Gravel, who ran on an anti-war platform as one of the longest of long-shot candidates in a crowded 2020 Democratic primary field, has dropped out of the race and endorsed Sen. Bernie Sanders (I-Vt.) and Rep. Tulsi Gabbard (D-Hawaii). “I’m proud and honored to endorse Sen. Bernie Sanders for the presidency of the United States,” Gravel said in a video shared on Twitter Tuesday. “Bernie has a program that benefits all Americans — not just the one percent. He will be a great president for all Americans.” He later clarified in an interview with media site Primo Nutmeg that he was endorsing both Sanders and Gabbard for the presidency and vice presidency, leaving it up to the voters to decide which position each would fill.

"I am proud and honored to endorse Senator Bernie Sanders for the presidency of the United States." pic.twitter.com/Y7uf8ebbhD — Mike Gravel (@MikeGravel) August 6, 2019

If you aren’t a political junkie, an avid Twitter trawler or a member of 2020 hopeful Marianne Williamson’s mailing list, this may be the first you’re hearing of the former Alaska senator and his unorthodox campaign for the Democratic presidential nomination. He failed to qualify for the first debate in June, and though he met the threshold of 65,000 individual donors required to make the second debate in July, he missed the polling mark and was left offstage. Gravel’s campaign, headed by teenagers David Oks and Henry Williams, took place almost entirely on Twitter. The pair of young political activists posted a mix of memes, progressive policy platforms and callouts of the views and voting records of fellow candidates, especially former Vice President Joe Biden. Gravel’s supporters, who enthusiastically refer to themselves as the #Gravelanche, brought him to the 65,000 unique donations that constituted one of the criteria to qualify for the early debate stage.

When is @Hickenlooper going to join his entire campaign staff in ending his presidential campaign? The debate stage already met its quota for anti Medicare-For-All candidates - maybe he could watch a movie instead? pic.twitter.com/PnyOfPxbge — Sen. Mike Gravel (@MikeGravel) July 9, 2019

Some candidates who did qualify for the debate, such as former Rep. John Delaney (D-Md.), did not meet the donor threshold but qualified instead by reaching 1% in three national polls approved by the Democratic National Committee. The Gravel campaign criticized the DNC for prioritizing polling numbers over donor count.

The DNC kept us off the stage tonight even though we qualified, but the #Gravelanche is not over. We're gonna keep going.



As the campaign ends, we're going to help build institutions on the left which can grow power, shape policy, and create strong activists for the long haul. — Mike Gravel (@MikeGravel) August 1, 2019

Gravel, who was persuaded to run for president by Oks and Williams, is best known for reading the Pentagon Papers into the Congressional Record at a subcommittee hearing in 1971. Those documents exposed lies from the White House to the public and Congress about the U.S. role in Vietnam leading up to and during the war. The then-freshman senator read 4,100 pages until past 1:00 a.m. when, with tears in his eyes and no other senators left in the room, he established unanimous consent and entered the pages into the record. Gravel left the Senate following his defeat in the Democratic primary in 1980. He ran for president in 2008 — first as a Democrat and later as a Libertarian — but failed to receive either nomination. This time around, Gravel and his campaign admitted that the nomination was not their true goal. While attending the June presidential debates, Oks and Williams told HuffPost they weren’t “in it for the long haul.”

.@MikeGravel’s guys took the tickets for the former senator and his wife. They inform me that Gravel 2020 isn’t “in it for the long haul.” They’ll endorse in coming months — Bernie, Warren, Tulsi, Yang or Marianne. They joke that Swalwell is in the mix. #gravelanche#demdebatespic.twitter.com/7LBBRrpY5f — Daniel Marans (@danielmarans) June 27, 2019