Former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE will travel across Iowa on a statewide bus tour leading up to the state’s first-in-the-nation caucus, his campaign announced Sunday.

Biden’s “Soul of the Nation” bus tour will cross the state after kicking off in Des Moines on Sunday.

The campaign tour will end back in Des Moines on Feb. 2 and 3.

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Biden will visit 20 cities in 17 counties. He’ll be joined by Iowa officials who have endorsed his presidential campaign including Democratic Reps. Abby Finkenauer Abby Lea FinkenauerTrump asked Chamber of Commerce to reconsider Democratic endorsements: report House Democrats' campaign arm reserves .6M in ads in competitive districts GOP leader says he doesn't want Chamber's endorsement: 'They have sold out' MORE and Cindy Axne Cindy AxneEric Idle threatens to sue GOP committee over use of Monty Python song in ad US Chamber of Commerce set to endorse 23 House freshman Democrats House Democrats target Midwestern GOP seats MORE.

Biden’s campaign stops across the state comes as several of his opponents, including Sens. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.), Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) and Amy Klobuchar Amy KlobucharThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill EPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates MORE (D-Minn), could be held up in Washington, D.C., as the Senate impeachment trial presses on.

Biden and Sanders are leading in Iowa, according to a CBS News poll conducted by YouGov released Sunday. Sanders, at 26 percent, had a 1 point lead over Biden which is within the poll’s margin of error.

A RealClearPolitics average of recent Iowa polls shows Biden with a slight 1.6 point lead over Sanders in the state.