The majority probably thinks he should be impeached for one scandal or another.
Check it out:

Standing resolute against the forces transforming the nation he loves, Lt. Gen. (Ret.) William G. “Jerry” Boykin thinks “the two most egregious violations of the trust of the American public” are the Veterans Affairs scandal and Benghazi — and in his opinion, these two cases rise to the level of impeachable offenses.

Speaking of the attack on the U.S. consulate in Benghazi, Libya, on September 11, 2012, General Boykin said, “If we will leave people behind on the battlefield and let them be overrun and killed by an enemy simply because it was politically inconvenient for us to respond to their calls for help, which is what I believe happened with all my heart. If we will do that, then the character of this nation is not the nation I grew up in and the nation I served for 36 ½ years. We have an obligation to people who serve this country, people serving our country.”