President Obama on Wednesday ratcheted up Democrats' attacks on third-party candidates, arguing anything other than a vote for Hillary ClintonHillary Diane Rodham ClintonNo Hillary — the 'Third Way' is the wrong way The dangerous erosion of Democratic Party foundations The Hill's Morning Report - Presented by Facebook - Democrats see victory in a voting rights defeat MORE is a vote for Donald TrumpDonald TrumpJudge rules Alaska governor unlawfully fired lawyer who criticized Trump Giuliani led fake electors plot: CNN Giuliani associate sentenced to a year in prison in campaign finance case MORE.
“If you don’t vote, that’s a vote for Trump. If you vote for a third-party candidate who's got no chance to win, that’s a vote for Trump,” Obama said during a radio interview with Steve Harvey.
Democrats have worried about Libertarian presidential nominee Gary JohnsonGary Earl JohnsonBiden broadened Democratic base, cut into Trump coalition: study New Mexico lawmakers send recreational marijuana bills to governor Judge throws out murder convictions, releases men jailed for 24 years MORE and the Green Party's Jill Stein drawing votes away from Clinton, the Democratic nominee, especially among younger voters.
Several liberal groups have targeted the third-party candidates recently in an effort to shore up support for Clinton, who is in a tighter-than-expected race against Trump, the Republican nominee.
Polls showing a close race between the major-party nominees in the battleground states of Colorado, Nevada and Virginia have show Johnson drawing significant support among young voters and independents.
Obama on Wednesday also argued that voters should be just as engaged this election as they were for his two White House bids.
"My legacy is on the ballot. All the work we've done over the last eight years is on the ballot," he said.
Obama also argued that Monday night's first debate showed that Clinton is qualified to be president, while also showing that Trump doesn't do his homework.