Well... let's say the reputation of the Texas AG is more than a little stained by that stunt. I think the skepticism is well deserved.
The overlap is interesting, IMO.
The election stunt is a pretty obvious play for a pardon from Trump.
Edit: According to NBC News, POTUS can pre-emptively issue a pardon.
[0] - https://www.nbcnews.com/politics/donald-trump/could-trump-pa...
But yes, if he has something that he can point to when re-election time comes around and say "Look, I tried to help Trump out" then it will probably guarantee him votes.
I'm a Texas resident and didn't know he had already been indicted. But I tend to vote Libertarian for local and state positions so I didn't really look too much into his background.