Former Vice President Joe Biden Joe BidenSenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE and Sen. Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE (I-Vt.) will face each other in four primaries Tuesday as Biden seeks to build a nearly insurmountable lead in the race for the Democratic nomination.

Biden is riding a wave of momentum after a strong Super Tuesday, including a convincing victory in Michigan’s crucial primary earlier this week, building a roughly 150-delegate lead over his progressive rival.

The former vice president is now looking to sweep all four states voting on Tuesday — Arizona, Florida, Illinois and Ohio — although Sanders will get a chance to try to stop his momentum when the two square off against each other during a debate on Sunday.

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Here are what polls show in each of the states voting Tuesday:

Arizona

Polling shows Biden with a strong lead in Arizona, which will allocate 67 pledged delegates, the smallest haul of the four states voting Tuesday.

An OH Predictive Insights poll released earlier this month showed him with a 28-point lead, and a Univision poll released Friday showed him 17 points ahead of Sanders.

However, Sanders, who has performed well with Hispanic voters in the West in primaries thus far, has a 5-point edge over Biden among Latinos in the Univision survey.

Sanders lost the Arizona primary to Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE in 2016 by about 15 points.

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Florida

Polls show Biden with a massive advantage in Florida, raising the prospect that the former vice president can deliver a heavy blow to Sanders’s White House ambitions by taking the lion’s share of the Sunshine State’s 219 delegates.

Biden has a 38-point lead in a recent Emerson College survey and leads Sanders by over 40 points in Gravis and University of North Florida polls from this month. The former vice president reached a high-water mark with a 55-point lead over Sanders in a St. Pete Polls survey.

Florida plays to several of Biden’s demographic advantages — the state is home to a good share of African American and older voters that have helped fuel his primary successes.

And while Sanders has done well among Latino voters, Hispanics in Florida are diverse and widely considered more conservative than others in the country, raising the prospect that his brand of democratic socialism may not be as palatable as it was in other states.

Biden has racked up endorsements from across the state, including from Nikki Fried, the commissioner of agriculture and consumer services in Florida and the only Democrat elected statewide.

Sanders lost the Florida primary by more than 30 points in 2016.

Illinois

Biden also appears to be in a strong position heading into the Land of Lincoln’s primary, holding double-digit leads over Sanders.

Gravis and Emerson College polls both released this week showed the former vice president with 38- and 21-point advantages, respectively.

Illinois’s primary, the second-largest of the four contests, will allocate 155 pledged delegates.

Biden has also gotten the endorsements of Illinois players like Chicago Mayor Lori Lightfoot (D).

Sanders narrowly lost the Illinois primary by under 2 points in 2016.

Ohio:

Polling is scarcer in the Buckeye State, but surveys still show Biden performing well in Ohio, which will award 136 delegates.

An Emerson College poll released this week showed Biden with a 22-point lead over Sanders in Ohio, a state both candidates are hoping to do well to prove their strengths with white working class voters who defected to President Trump Donald John TrumpObama calls on Senate not to fill Ginsburg's vacancy until after election Planned Parenthood: 'The fate of our rights' depends on Ginsburg replacement Progressive group to spend M in ad campaign on Supreme Court vacancy MORE in 2016.

Observers believe that Biden’s victory in Michigan, which was largely fueled by white voters both with and without college degrees, could leak into Ohio, another Rust Belt state.

Sanders lost Ohio’s primary by about 13 points against Clinton.