So let's take a look at the landscape, in order of most to least likely to flip. Tier 1 is most likely, Tier 2 is competitive but less likely, and so on. Race rating denotations (Toss-Up, Lean, etc.) are based on the Cook Political Report.

Scott Colom, a state prosecutor, is running against Senator Cindy Hyde-Smith, a Republican who denied him a seat on the federal bench. In a tough year for the G.O.P., Democrats see hope for his long-shot bid.

John Oliver tore into conservative Tennessee Senator John Stevens’s “desperate” attempt to “play dumb,” after Stevens made an absurd claim about race amid redistricting in the state. “Now, under the law,

The Georgia Senator held a news conference in response to the Supreme Court’s 6-3 ruling that weakened section two of the Voting Rights Act. The now-weakened section allowed, and sometimes required, race to be taken into account when building voter maps, and was intended to protect minority voter rights.