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’s campaign manager tamped down 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’s upset victory in Michigan on Tuesday by declaring that Clinton’s delegate lead continues to creep closer to her clinching the nomination.

“From the beginning, we have approached this nomination contest as a battle for delegates. And while Sen. Sanders has placed big bets on pulling out wins in certain individual states, we have sought to play everywhere in every state to win as many delegates possible,” campaign manager Robby Mook said Wednesday on a conference call with reporters.

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"We are nearing the point where our delegate lead will effectively become insurmountable."

On Tuesday, Sanders and Clinton split Michigan and Mississippi, the two states up for grabs. But the margins told a different story.

Clinton ran up the score in Mississippi, winning 29 delegates to Sanders's 4, according to The Associated Press. While Sanders won in Michigan, he won 65 delegats compared to Clinton’s 58 thanks to the razor-thin margin there.

That reality, Mook told reporters, means that Clinton now has a larger lead than Barack Obama Barack Hussein ObamaThe Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon Trump appointees stymie recommendations to boost minority voting: report Obama's first presidential memoir, 'A Promised Land,' set for November release MORE had over Clinton during his 2008 campaign.

Sanders’s team is banking on the fact that his upset victory in Michigan will cast doubt on the race’s current narrative, as polls showed Sanders well behind Clinton in the days before Tuesday. And they continue to pledge to keep the campaign going until the convention, arguing that delegate-flush states like California, New York and New Jersey that don’t hold primaries until the latter part of the primary calendar could help them close the gap.

To capture the nomination, a candidate needs 2,382 delegates. Including superdelegates, Clinton has 1,221 delegates, while Sanders has 571.