It takes 60 votes to overcome filibusters in the Senate, and Republicans only have 52.

However, there are Ten Red-State Senate Democrats up for reelection in 2018 who may (or may not) be willing to side with Trump.

It is impossible to know how this unprecedented drama will unfold for them. As the nonpartisan Cook Political Report put it in a recent analysis: "The reality is that no one has any idea what the political environment is going to look like in the summer and fall of 2018.

In political terms, the Democratic 10 actually divide into two subgroups, those from states Mr. Trump carried easily and those from states he barely won. In the former category are West Virginia's Joe Manchin, North Dakota's Heidi Heitkamp, Montana's Jon Tester, Missouri's Claire McCaskill and Indiana's Joe Donnelly. On the other end of the scale are those from states Mr. Trump won in a squeaker: Pennsylvania's Bob Casey, Wisconsin's Tammy Baldwin, Florida's Bill Nelson and Michigan's Debbie Stabenow. Somewhere in the middle is Ohio's Sherrod Brown, from a state Mr. Trump won by eight points.