The race for Michigan's open Senate seat between Democratic U.S. Rep. Elissa Slotkin and Republican former congressman Mike Rogers remained too early to call Wednesday after results in other states showed Democrats lost their slim majority in the upper chamber.

Representative Elissa Slotkin, a centrist with strong national security credentials, won the contest to succeed the retiring Senator Debbie Stabenow.

The 8th District, in the Tri-Cities region, was Michigan's other open House race with the pending retirement of sixth-term Democratic Rep. Dan Kildee. State Sen. Kristen McDonald Rivet, a Democrat, defeated Republican Paul Junge to keep the seat in Democratic hands. She was leading by 6 points with 92% of the estimated votes reported.