President Donald Trump and Republicans facing reelection in the U.S. Senate are facing some of their worst poll numbers of this election cycle as civil unrest over race and policing dominate the headlines and ...

Republicans hold a 53-47 advantage heading into November's election, which means the GOP can afford to lose a net two seats (and the presidency) while still keeping control of the chamber. Democrats will need a net gain of three seats and a Joe Biden victory in the presidential race to wrest control. (They'd need a net gain of four if Trump wins reelection).

If the economy continues to show improvement in the coming months and the unrest over issues of race and policing subsides, Republicans' chances should improve, too. So see this ranking as a likely worst-case scenario for the GOP with plenty of time and opportunity to gain ground.

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