It’s a little more complicated than what I have been reading on FR. Here in Texas, the commentaries are that two other DA’s were caught intoxicated, but Perry didn’t threaten them or asked for their resignation (Republican DA’s). They are implying double standard. The other issue is that the drunk DA in this instance was about to investigate an organization that had several ties to Rick Perry and some of his friends. When she got caught with DWI, they say Perry took advantage of this situation to defund her office and roles to reduce/stop the investigation. May be hard to connect the dots for a conviction, but in essence, that is the Liberal’s reasoning for Perry trying to get rid of her and why they are trying to prosecute Perry.
Big so-what. It's politics -- it's unfair. You favor your own team, you diss the other team. As long as you don't break the law, let 'em scream.
If Perry was a Dem, and did the equivalent thing, we'd all be screaming it was unfair, but unless a law is broken, "fair" doesn't need to apply to politics.
It's nice when it does, but nobody expects it to always be nice.