After dominating wins in Tuesday’s primaries, it has become clear (if it wasn’t yet already) that Joe Biden will be the Democratic nominee against Donald Trump in November. Considering a month ago Bernie Sanders seemed to have a lock on the nomination after becoming the first candidate of either party to win the popular vote in the first three primary states, this is a remarkable comeback.

So, how did Biden go from being crushed in early states to commanding victories in liberal Massachusetts and Washington, the Midwest in Michigan and Minnesota, as well as the entire South, including Texas? The answer is simple: Biden did what he’s been doing his entire political career — he built a diverse coalition.

Throughout the primary cycle, only Biden and Sanders consistently polled well with the African American electorate, with no other candidate consistently reaching double digits. The South Carolina primary — where 60% of the Democratic electorate is black — confirmed this after only Biden and Sanders received delegates from the contest.

But despite getting some Black support, Sanders was still a very distant second, and Biden quickly used his victory to consolidate, managing to secure Pete Buttigieg’s and Amy Klobuchar’s endorsements when they dropped out before Super Tuesday. The victory and the endorsements helped signal to the American people that the public would get behind a Biden candidacy, making Mike Bloomberg’s pitch fall by the wayside, leaving Biden with a powerful coalition to nearly sweep Super Tuesday.

Since his victories in South Carolina and on Super Tuesday, the strength of Biden’s coalition has been on full display. Of the nine states that have voted since Super Tuesday, Biden has won eight, losing only North Dakota, the smallest. He has won states across all geographic areas of the country as well as every swing state that’s voted so far. He won every county in Michigan and Florida, including the ones with cities and college towns. He’s won in the suburbs and the college educated, and with women. Honestly, unless you’re under the age of 35 or a self-described progressive, you probably voted for him too.

And why wouldn’t you vote for him? Joe Biden was the vice-president of a popular president who is still loved by Democrats. The policies he wants to enact are exactly what most liberals want. As a result, he’s convinced nearly every demographic in the democratic electorate to support his candidacy. If you are a Democrat, or even a moderate Republican, there is a place for you in his campaign.

The one group he hasn’t yet gotten is the youth vote, who have remained solidly with Sanders for the entire cycle. Sanders’ campaign strategy is based around his unwavering convictions towards progressive ideals, support for a “political revolution” and generational change. He hoped to inspire an unprecedented youth turnout, which did not occur. For his campaigning efforts, Sanders has received 30% of the total vote.

Bernie Sanders could have been the Democratic nominee for president. After the Nevada caucus, he could have modified his campaign strategy to expand his base. Instead, Sanders decided to double down on Democratic Socialism and the upcoming political revolution, hoping to ride the energy of his base past his divided, moderate opposition.

When the moderates decided to unify behind Biden, the Sanders campaign had no plan. Either Sanders or his movement had alienated too many potential supporters, who quickly became fine with the prospect of voting for Biden for president without other candidates competing for their votes. When faced with a binary choice between Joe Biden and Bernie Sanders, the vast majority of people choose Biden.

Joe Biden may be a 77-year-old white man, but he created a voting coalition that embodies the “big tent” politics Democrats strive for. People from all regions of the country, from the white, working class factory worker in Michigan, to the suburban teacher in Virginia, to Cuban immigrants in Miami have all decided to support Biden. If only the youth vote decides to join his coalition, and maybe even if they don’t, Joe Biden might be unstoppable in November.