Republican candidate Matt Van Epps’s victory in Tennessee’s 7th Congressional District special election prompted celebrations from his Republican colleagues in his state, Congress, and the White House.

Early results are showing 36-year-old liberal state Rep. Democrat Aftyn Behn with an early lead over Republican U.S. Army combat veteran Matt Van Epps in the special election for Tennessee’s 7th Congr...

The victory for Van Epps will help shore up a razor-thin Republican House majority and break a building wave of Democrat victories ahead of the midterms.