Meet the Press NOW — September 8

Republicans are set to gather in Dallas for their midterm convention even as President Trump is facing political headwinds ahead of November. NBC News Chief Data Analyst Steve Kornacki previews the key primaries in New Hampshire. Karishma Manzur (D-N.H.) and Scott Brown (R-N.H.) join Meet the Press NOW to discuss their bid to replace retiring Sen. Jeanne Shaheen.