Age is not holding a lawmaker back in Texas.
The oldest-congressman ever is running for re-election.
Ninety-one-year-old Ralph Hall faces the toughest test of his political career Tuesday from a Republican primary challenger barely half his age.
Forty-eight-year-old John Ratcliffe is trying to oust Hall in a primary runoff, claiming he's the stronger conservative.
With no Democratic candidate, the winner will be unopposed in November.