Republican presidential candidate Donald Trump greets Indiana Gov. Mike Pence

It appears that Donald Trump is finally taking the conventional approach, announcing Friday morning that he has chosen Indiana Governor Mike Pence as his running mate.

Pence isn't an outspoken fighter, like New Jersey Gov. Chris Christie, who could have easily alienated more voters. He's also not a flamboyant, expressive voice, like Newt Gingrich, who could have wound up competing with Trump for attention.