Harvard law professor Larry Lessig is ending his bid for the Democratic presidential nomination. 

 Lessig blamed the demise of his nearly three-month campaign on the Democratic Party, which he says leaves him "just shut out" of the primary debates. He struggled to hit 1 percent in national polls, the necessary marker to qualify for the primary matchups. 

"I may be known in tiny corners of the tubes of the Internets, but I am not well-known to the American public generally," he said in an online video released Monday. 

Lessig focused his campaign exclusively on a single issue: Curbing the influence of big money in politics. His platform centered on passing the sweeping "Citizens Equality Act," a bill that would address campaign finance reform, enhance voting rights and end gerrymandering of electoral districts. 

"Our only chance to make this issue central to the 2016 presidential election was to be in those debates," he said. 

Initially, the 54-year-old South Dakota native promised to resign and let his vice president take over after he signed the legislation in to law. He declined to name potential vice presidential picks when asked. 

He later promised to serve a full-term, saying the resignation "weakened the credibility of the campaign." 

Without being able to reach the millions of voters who tune into presidential debates, Lessig said he had little chance of making a serious impact on the race. 

He vowed not to give up his fight, saying Congress has become "crippled and corrupted." 

"No doubt a better candidate could have gone further, but I doubt anyone could have worked harder," he said.