Because he’s getting old?
Tennessee has gotten pretty red, as the last Senate election showed. He probably figures that at best the Republicans hold onto a narrow Senate majority with a Democratic House and President.
Well, he’s 78 and may be that rare Senator who would prefer to depart the chamber on his own two feet rather than on a gurney. As the article says, he’s always been pretty conservative but also someone amenable to working across the aisle on occasion and cutting a deal. He’s almost certain to be replaced by somebody worse.
I don’t know which class he’s in, but “will not seek re-election” at this point just means, at the minimum, that he’s still on the job for two more years.
The seat’s up in 2020.
I live in TN.
He’s a plague.