Just a week ago, Bernie Sanders was surging in Texas, with one poll showing him winning by 15 points. His campaign proudly boasted that he would win the state where he invested in new campaign offices and held high-profile rallies. Yet on Super Tuesday, Joe Biden managed to capture the state, in large part because Sanders’s solid support among Latino voters was offset by Biden’s overwhelming support among black voters.

Some 3 in 5 black Texans voted for Biden, according to exit polls. In contrast, only 2 in 5 Latinos voted for Sanders. But seeing as black voters comprise a fifth of the Texas electorate while Latinos constitute a third, those figures ended up roughly equal.