Pence was the top contender in a pool that included Newt Gingrich and Chris Christie.
Presumptive Democratic nominee Hillary Clinton's immediately punched back a response to Pence.
A few important factoids on Pence, if you haven't heard much about him yet:
He's a social conservative. Pence describes himself as "a Christian, a conservative and a Republican, in that order."
He endorsed Ted Cruz for president in the Republican primary.
He's a personal friend of House Speaker Paul Ryan, who clearly likes him.
He was involved in last year's religious freedom debate in regards to same-sex weddings.
He grew up a Democrat, idolizing John F. Kennedy