Republicans are the slight favorites to win an open Senate seat in Ohio, but first their candidate will need to prevail in a crowded primary fight. Democratic front-runner Tim Ryan is already keeping a packed campaign schedule — but he could have trouble persuading the independent voters he needs in an increasingly Republican state.This episode: White House correspondent Ayesha Rascoe, congressional correspondent Kelsey Snell, and national political correspondent Don Gonyea.Connect:Email the show at nprpolitics@npr.orgJoin the NPR Politics Podcast Facebook Group.Subscribe to the NPR Politics Newsletter.Find and support your local public radio station.