He will regret it even more after the 2018 bielection when they will probably lose a net of 10-20 of their remaining Democrat-held Senate seats. At that point, the filibuster tactic wouldn’t work anyway.
No kidding. The senate seats up in 2018 are almost all states Trump won.
The blue wall of Wisconsin, Michigan, and Pennsylvania are up.
Plus Montana, North Dakota, West Virginia, Indiana, Missouri, Florida, Ohio, and Virginia.