For all the strategic calculations, sophisticated voter targeting and relentless talk about electability in Iowa and New Hampshire, the Democratic presidential nomination will be determined by a decidedly different group: black voters.

African Americans will watch as mostly white voters in the first two contests express preferences and winnow the field — then they will almost certainly anoint the winner.

So far, that helps explain the front-running status of former Vice President Joe Biden. He has name recognition, a relationship with America’s first black president and a decadeslong Democratic resume. Black voters have long been at the foundation of his support — his home state of Delaware, where he served as a U.S. senator for nearly four decades, is 38 percent black — and until another presidential candidate proves that he or she can beat him, he is likely to maintain that support.

In the 2008 campaign, Hillary Clinton held a strong lead among black voters over Barack Obama until he stunned her by winning the Iowa caucuses and proved to black voters that he was acceptable to a broad spectrum of Democrats. Those same voters returned to Clinton in 2016.

This cycle, many black voters are also making a pragmatic choice — driven as much or more by who can defeat President Donald Trump as the issues they care about — and sitting back to see which candidate white voters are comfortable with before deciding whom they will back.

At the same time, the early courtship of black voters, overt and subtle, is part of a primary within the primary that includes detailed plans on issues like criminal justice reform, reparations, maternal mortality among black women, voter suppression and systemic racism.