James Talarico, the Democratic nominee for Senate in Texas, speaks at a campaign event in San Marcos, Texas, Oct. 15, 2026. In the Texas Senate race, Republican Ken Paxton and Talarico converged in Tarrant County, a key battleground where a dispute over polling sites energized Democrats while Republicans sought to defend a longtime stronghold. (Callaghan O’Hare/The New York Times) By J. DAVID GOODMAN and JESÚS JIMÉNEZ For a fleeting moment Monday night, James Talarico and Ken Paxton were…