Democrats will have to have a dream election in 2020 to take back the Senate. Republicans currently have the majority by four seats, and even though the GOP is defending seven of the 10 most competitive Senate seats on the ballot this year, most of those are in states President Trump won. Two Democrats on this list are also trying to get reelected in states that Trump won.

We're just under year and a half out from the election, so these races are still taking shape. As they stand right now, here are the top 10 Senate races, ranked in order of least likely to flip parties (number 10) to most likely to flip parties (number 1). We will update this list semi-regularly, and much more regularly as the election nears.

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