If someone uses their office to impede a criminal investigation, does that constitute malfeasance in office?

*I* think so, but I'm not a lawyer.

From an opinion piece in the Arizona Republic by Laurie Roberts, dated 1/6 -

Far-right wants to impeach Kris Mayes for enforcing election law in Cochise County

Impeachment fever has reached Arizona as the Maricopa County Republican Party brain trust on Tuesday called for the ouster of Democratic Attorney General Kris Mayes.

The party’s hard-right leaders are furious that a pair of Republican Cochise County supervisors have been indicted on charges that they interfered with the 2022 election.

Apparently, it’s now a “grotesque abuse of office” to require county supervisors to follow state law — the one that says they must certify election results within 20 days of an election.

[snip]

Hoffman puts impeachment on the table

So much so, in fact, that they plan to embark upon a little weaponization of their own.

“You can bet your a-- that the @AZFreedomCaucus will be looking at every possible option to make weaponizing our state’s government and abusing Executive power as painful as humanly possible,” Sen. Jake Hoffman, R-Queen Creek and Freedom Caucus chairman, announced on social media shortly after last week’s indictments.

Hoffman's posts on Elon Musk's vanity project/hatefest X, formerly known as Twitter -

Hoffman was one of the fake electors in AZ being investigated by AG Mayes.

Assuming that Hoffman goes forward with his scheme and isn't just talking out of his posterior spouting talking points, he may find himself with some credibility issues.  He engaged in some antidemocratic behavior and is seeking to use his position to forestall an examination of that behavior.

Of course, he could find another R to be the public face of his impeachment scheme, one with a reputation for being an honorable human being.

Of course2, he may that difficult to pull off, for two reasons - 1. R legislators in AZ tend to fall into one of three character categories bad, very bad, and less bad.  2. There was a time when certain Republican legislators were wrong, politically, but were otherwise decent people.

That time is not now.