Less than a week after former Rep. Mark Neumann (R-Wis.) picked up endorsements for his Senate primary bid from two Republican Senators, former Gov. Tommy Thompson responded with four GOP Senate endorsements of his own.

The Thompson campaign touted new endorsements from Sens. Lamar Alexander (Tenn.), John Hoeven (N.D.), Mike Johanns (Neb.) and James Risch (Idaho). Last week, the Neumann campaign announced the support of Sens. Rand Paul (Ky.) and Tom Coburn (Okla.).