Joe Biden revealed the big news first to his supporters, writing:

‘I have the great honor to announce that I’ve picked @KamalaHarris – a fearless fighter for the little guy, and one of the country’s finest public servants – as my running mate,’ Biden wrote on Twitter. ‘Together, with you, we’re going to beat Trump.’

 

 

His running mate is the first black woman to hold the V.P. spot.

Supporters rushed to congratulate Ms.Harris …and Biden.

‘Joe Biden nailed this decision,’ former President Barack Obama said in a statement.  ‘Choosing a vice president is the first important decision a president makes.’

For her part, Harris was thrilled, tweeting:

 

To echo Obama’s words, ‘ ‘Now let’s go win this thing.’