State Rep. Joe Carr called the 73-year-old Alexander "the most liberal" member of Tennessee's GOP delegation, The (Nashville) Tennessean reported Tuesday.
Carr is a fierce advocate of the Second Amendment and frequent sponsor of bills that have irritated immigration advocates. He was elected to his seat in the Tennessee House of Representatives in 2008.
Insiders have anticipated a Tea Party candidate would challenge Alexander.
Beautician charged with giving client fatal silicone butt injection
Ohio bar shooting arrested, charged with murder