I don't think things are going to change because Clinton will still win. This move was to help shore up support among the far right of the GOP.
However, Trump is long gone as a viable candidate. This despite the media trying to make this race a horse race.
This is the Trump-Pence logo:
The Trump logo is coming under a lot of ridicule.
The Trump announcement on Twitter:
I am pleased to announce that I have chosen Governor Mike Pence as my Vice Presidential running mate. News conference tomorrow at 11:00 A.M.— Donald J. Trump (@realDonaldTrump) July 15, 2016