@scottyorange
I'm sure there are political dimensions they're considering -- the messaging at the RNC is now out of date, so it deflates some of their post-convention boost. It allows time to vet a VP without there being a lot of time for the media to tear them down and make delegates nervous about their choices.
@AlphaCentauri That is a good point I had not thought of yet. It does deflate a lot of the messaging the other side has spent time and money on.