Sen. Thom Tillis (R-NC) speaks to reporters on Capitol Hill. Ghislaine Maxwell Denied Immunity to Testify Before Congress Robin Roberts Leaves GMA for an 'Incredible Journey' Abroad with Her Wife Amber Laign

With former Gov. Roy Cooper widely viewed as Democrats’ best bet of flipping outgoing Sen. Thom Tillis's (R-NC) seat, former Democratic Rep. Wiley Nickel declined to mount a primary challenge against him.

A former congressman will no longer seek an open U.S. Senate seat in North Carolina next year now that fellow Democrat Roy Cooper is running for the post.Tuesday's announcement by ex-U.S. Rep. Wiley Nickel came the day after Cooper,