Whatley previously met with National Republican Senatorial Committee Chairman Tim Scott about a potential Senate run in North Carolina, and the NRSC had been floating Whatley as a possible replacement for Tillis since January, according to a GOP operative. Tillis did not announce his plans to not seek re-election until months later.

Lara Trump, the president's daughter-in-law and former co-chair of the Republican National Committee, will not be pursuing a run for retiring North Carolina Sen. Thom Tillis' seat. Why it matters: The announcement comes after multiple outlets reported RNC chair Michael Whatley will join the race.

The universe of competitive Senate races remains small after new ratings by Inside Elections, and that's good new for Republicans.