Don't bet on Mitch McConnell retiring soon. It took him 40 years to reach sexual maturity and it's estimated that he could live for up to 200 years. His constant growth necessitates shedding his scutes, which are made of keratin, every few months.
Mitch McConnell is ectothermic, so he is unable to regulate his own body temperature, meaning he enters a state of brumation during the fall and winter months. This is why he adjourns the senate during the holidays.
Mitch McConnell uses the roof of his mouth to smell, specifically is vomeronasal organ, so when he's standing around with his mouth open in the Senate chambers he is in fact "tasting" his fellow Senators.
While Mitch McConnell has a strong, sharp beak capable of 300 pounds of pressure per square inch, he has no teeth. That means he can effectively rend flesh, but is rendered helpless by a mouth full of popcorn!
Like most testudines, Mitch McConnell has not evolved a strong sense of hearing and can only detect sounds over 60 decibels. He has also never been observed registering whispers, distant speech, or the needs of constituents.