Super Tuesday is looming larger than ever for the Democratic presidential candidates, even as the next two states to vote, Nevada and South Carolina, command media focus.

Those two states are particularly important for 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.), who could copper-fasten his front-runner status with a win in Nevada, and for 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, who desperately needs a strong showing in South Carolina.

But Super Tuesday will be the most critical day of the primary campaign — and it could be the end of the road for several White House hopefuls.

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Fourteen states are to vote on March 3. They include California, the single biggest prize in the race with 415 delegates to the Democratic National Convention, and Texas, which has 228 delegates.

To put those figures in perspective, the delegate race is almost tied between former South Bend, Ind., Mayor Pete Buttigieg Pete ButtigiegBogeymen of the far left deserve a place in any Biden administration Overnight Defense: Woodward book causes new firestorm | Book says Trump lashed out at generals, told Woodward about secret weapons system | US withdrawing thousands of troops from Iraq A socially and environmentally just way to fight climate change MORE and Sanders, who have 22 and 21 delegates, respectively.

In total — including primaries in American Samoa and among Democrats abroad — there are 1,357 delegates up for grabs on Super Tuesday.

But the day will be crucial for reasons beyond the delegate math.

It will be the first time that former New York City Mayor Michael Bloomberg Michael BloombergTop Democratic super PAC launches Florida ad blitz after Bloomberg donation The Hill's 12:30 Report - Presented by Facebook - Latest with the COVID-19 relief bill negotiations The Memo: 2020 is all about winning Florida MORE is on the ballot.

Bloomberg’s huge spending — he is estimated to have forked out around $350 million in advertising alone since beginning his campaign in late November — has boosted him in national polls.

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Bloomberg now sits in third place in the RealClearPolitics national polling average, with about 14 percent support.

But a host of questions face Bloomberg, and Super Tuesday will answer them.

Can he actually win primaries rather than merely turning in decent performances? Can he prove himself to be a candidate with national appeal, on a day when states as different as Alabama and Utah cast ballots? And can he establish himself as the chief standard-bearer of moderate Democrats — a goal that would require him to administer a clear-cut defeat to Buttigieg and several others?

It’s possible everything falls into place for Bloomberg. But it is equally plausible that a host of problems make themselves felt between now and then.

The former mayor must soon decide whether to participate in debates, where attacks from rivals could hurt him.

He is also facing new scrutiny over his record as mayor, including his years-long backing of the controversial police tactic known as stop and frisk.

Bloomberg has been showing growth in terms of black support in the polls — but how will his record reverberate among the Democratic electorates in places like Alabama and North Carolina? In 2016, black voters cast 54 percent and 32 percent, respectively, of all Democratic primary ballots in those states, according to exit polls.

Bloomberg is far from the only candidate who faces a day of reckoning on Super Tuesday.

Biden’s campaign has been little short of a disaster up to now. Even if he wins in South Carolina — far from a certainty — he needs to keep that momentum going across the nation on Super Tuesday.

If he doesn’t, his already-questionable claim to being the most electable candidate in the field will lie in ruins.

Sen. Elizabeth Warren Elizabeth WarrenWarren, 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 No new taxes for the ultra rich — fix bad tax policy instead MORE (D-Mass.), who led several national polls in October before losing altitude, could also face the end of her campaign unless she racks up actual wins.

Warren has recently been emphasizing that her campaign is built for the long haul. She has also sought to position herself as a potential unity candidate.

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But how she makes the case for a candidacy that has so far underperformed is unclear, unless she gets a Super Tuesday boost.

Warren does have one favorable card to play — though the same is true of some of her rivals.

Warren’s home state of Massachusetts is among those voting that day. Also playing with some home-field advantage are Sanders in Vermont and Sen. Amy Klobuchar Amy KlobucharEPA delivers win for ethanol industry angered by waivers to refiners It's time for newspapers to stop endorsing presidential candidates Biden marks anniversary of the Violence Against Women Act, knocks Trump and McConnell MORE in Minnesota.

Klobuchar enjoyed a late surge in New Hampshire to finish third in the Granite State primary this week. But she faces an uphill battle in Nevada, on Feb. 22, and South Carolina a week later. On Super Tuesday, one of her big hurdles could be money.

TV advertising is essential with so many states voting at once — a factor that makes the kind of retail politicking seen in Iowa and New Hampshire useless.

California and Texas, in particular, are extremely expensive for TV advertising.

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At the end of last year, beginning the final sprint into the primaries, Klobuchar had $5 million cash on hand, the lowest figure of any of the top-tier contenders.

The Minnesota senator also has to build out some semblance of an organization across the 14 Super Tuesday states in almost no time.

The money factor benefits Bloomberg but also, in a very different way, Sanders. The Vermont Independent has been the most prodigious fundraiser of the 2020 cycle, leaning heavily on low-dollar online contributions.

If Sanders extends his winning streak on Super Tuesday — and moderate support splinters rather than coalesces behind any one candidate — he will be well on his way to becoming the Democratic nominee.