One of the more fascinating theories being kicked around about the timing of Hillary Clinton’s vice-presidential selection announcement deals with the outcome of the Republican National Convention.

If the GOP finishes the convention tonight on a downer, the theory goes, Clinton is going to wait a day or two before making her big announcement.

If it finishes on a high note, if Donald J. Trump hits it out of the arena tonight when he makes his presidential nomination acceptance speech, Clinton well might be set to announce her selection Friday morning.

She might even leak it out over Twitter, say, around midnight.

My own gut tells me that she’s made up her mind, that she’s notified all the candidates she “vetted” for the VP post and that she has worked out a pending appearance with whomever she has selected.

Whether announces her selection early — or later — well might depend on the way the Republicans conclude their convention.

I’m all ears.