Welcome to The Hill's Campaign Report, your daily rundown on all the latest news in the 2020 presidential, Senate and House races. Did someone forward this to you? Click here to subscribe.

We're Julia Manchester, Max Greenwood and Jonathan Easley. Here's what we're watching today on the campaign trail.

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LEADING THE DAY:

Sen. Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE (I-Vt.) isn't going anywhere yet.

In a defiant news conference on Wednesday following a stinging defeat in Michigan's Democratic presidential primary on Tuesday, Sanders said he would carry on in the nominating contest and would move forward with a one-on-one debate against former Vice President Joe Biden Joe BidenCast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response Biden tells CNN town hall that he has benefited from white privilege MORE on Sunday.

Sanders offered a sober assessment of his campaign, acknowledging that he was losing the "debate over electability" in the primary. But he insisted that he was winning both the "ideological" and "generational" debate, pointing to his strong support among young voters and chastising Democrats for not doing more to reach that constituency.

"You must speak to the issues of concern to them," Sanders said. "You cannot simply be satisfied by winning the votes of people who are older."

The remarks came at a trying time for the Vermont senator. His case for staying in the nominating contest is getting thinner after a disappointing series of primary losses. His defeat in Michigan was particularly crushing; he won the state in his primary bid against Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE four years ago and has long argued that his populist message would resonate with working-class voters in the state and help Democrats win it back from President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE in 2020.

At the same time, Democratic officials, outside political groups and former rivals are coalescing around Biden as the presumptive nominee. He's also facing the prospect of an increasingly brutal primary schedule in the coming weeks, as the race turns to states like Florida, where polls show Biden leading by massive margins.

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Still, Sanders is showing no signs of slowing down. At his Wednesday press conference, he telegraphed plans to aggressively question Biden at a Democratic debate in Phoenix on Sunday, including over what the former vice president would do to address income inequality, criminal justice reform and climate change and if he would really veto a Medicare-for-All bill if it passes Congress?

Whether that debate can turn Sanders's political fortunes around is unclear. Speaking to reporters on Wednesday, however, he made clear that he was focused first and foremost on beating Trump.

"Let me conclude by the way I began," he said. "Donald Trump must be defeated, and I will do everything in my power to make sure that happens."

READ MORE:

Sanders vows to carry on as Biden grows delegate lead, by The Hill's Jonathan Easley

Sanders faces pivotal moment after dispiriting defeats to Biden, by Jonathan

Five takeaways from the latest Democratic primaries, by Jonathan

FROM THE TRAIL:

Questions have swirled around about how campaigns and polling locations at all levels will handle the outbreak of the coronavirus as another wave of voters in Arizona, Florida, Illinois and Ohio prepare to head to the polls next week. Biden is slated to address the coronavirus response on Thursday from Wilmington, Del., and announced a team of six medical experts on Wednesday that will make up his public health advisory committee. The outbreak led Biden and Sanders to cancel their Tuesday night campaign events in Cleveland due to advice to avoid large gatherings. The Biden campaign on Wednesday also said he would switch to holding "virtual" events in Florida and Illinois. An American Federation of Labor and Congress of Industrial Organizations (AFL-CIO) forum scheduled for Friday in Orlando was also canceled amid coronavirus concerns.

Meanwhile, on President Trump's campaign, his spokeswoman Kayleigh McEnany is defending his decision to continue to hold campaign rallies in the wake of the coronavirus. "The president is the best authority on this issue. He takes into consult the words of everyone around him, that would include [Health and Human Services Secretary] Alex Azar, that would include Dr. [Anthony] Fauci, that would include others. So, I'll leave it to the president," McEnany said. "Right now, we're proceeding as normal." Trump is slated to deliver an Oval Office address on the virus tonight.

Voter turnout in the Democratic primaries in Michigan, Missouri and Mississippi soared to its highest levels in more than a decade on Tuesday, Max reports. That turnout – driven by black voters, moderates and suburbanites – largely broke in favor of Biden, who swept a majority of the six states that held their nominating contests on Tuesday. In Michigan, turnout shattered an all-time record, with nearly 1.6 million voters heading to the polls. The two other states that held primaries on Tuesday, Washington and Idaho, also saw massive increases in Democratic votes cast, though it's difficult to compare turnout to prior years, because both states switched from caucuses to primary systems, which typically drive higher turnout. And in North Dakota, turnout was quadruple what it was in 2016, helped along by new caucus rules that make the nominating contest look more like a primary.

PERSPECTIVES:

Keith Naughton: Michigan to Sanders: The revolution has been cancelled

Albert Hunt: Biden now has a route to the Oval Office -- if he navigates the challenges

Brent Budowsky: Biden could defeat Trump by an FDR-like landslide -- here's how

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FROM CONGRESS AND THE STATES:

Massachusetts Rep. Joe Kennedy Joseph (Joe) Patrick KennedyMassachusetts town clerk resigns after delays to primary vote count Bogeymen of the far left deserve a place in any Biden administration Hillicon Valley: Election officials prepare for new Russian interference battle | 'Markeyverse' of online fans helps take down a Kennedy | GOP senators unveil bill to update tech liability protections MORE's campaign said the Democratic Senatorial Campaign Committee (DSCC) has prevented him from launching a group aimed at helping other Senate Democrats up for reelection. The Hill's Julia Manchester reports that Kennedy planned to launch a joint committee to raise funds and support four Democratic Senate candidates. The Boston Globe reported that the candidates were receptive to the plan but that the Kennedy campaign was later told by one of the Democratic campaigns that the DSCC, which is focused in part on defending incumbents, said that they could not team up with Kennedy in the proposed committee.

Former Attorney General Jeff Sessions Jefferson (Jeff) Beauregard SessionsTrump's policies on refugees are as simple as ABCs Ocasio-Cortez, Velázquez call for convention to decide Puerto Rico status White House officials voted by show of hands on 2018 family separations: report MORE brushed off President Trump's endorsement of his Senate primary opponent Tommy Tuberville in the run-off race for the Senate seat that Sessions vacated in 2017 when he became attorney general. "We are Alabama. Nobody tells us how to vote or what to do," Sessions tweeted. Here's more from The Hill's Tal Axelrod

POLL WATCH:

ARIZONA (Latino Voters) Telemundo/Mason-Dixon

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Sanders: 47 percent

Biden: 40 percent

FLORIDA (Latino Voters) Telemundo/Mason-Mason-Dixon

Biden: 48 percent

Sanders: 37 percent

ARIZONA SENATE - OH Predictive Insights

Mark Kelly 49 percent

Martha McSally Martha Elizabeth McSallyThe Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Biden leads Trump by 4 points in new Arizona poll Airline job cuts loom in battleground states MORE 42 percent

MARK YOUR CALENDARS:

March 15:

-Eleventh Democratic presidential primary debate

March 17:

-Arizona Democratic primary

-Florida primaries

-Illinois primaries

-Ohio primaries

March 24:

-Georgia primaries

March 29:

Puerto Rico Democratic primary

We'll see you tomorrow with a recap of the latest campaign news and updates!