The threatened filibuster by the Democrats of Judge Neil Gorsuch seems irrational if its purpose to help create a Supreme Court more friendly to Democratic commitments. Almost everyone expects the response by the Republicans will be the so-called nuclear option by which they use their majority to end the filibuster rule for Supreme Court nominations. The Republicans believe that filibustering a mainstream judge in the first year of a President’s term is illegitimate. Given that in 2013 the Democrats eliminated the filibuster for lower court and executive appointments, they will also regard themselves fully justified in taking a similar action themselves. And the Republicans will be acting within their constitutional rights: as Mike Rappaport and I have shown, the Senate majority must have the authority to change supermajority rules by majority vote.
The elimination of the filibuster leaves the Democrats in a worse position for the rest of President Trump’s term. The most obvious reason is that they then cannot filibuster the next nomination— the one likely to fill the seat of Justice Ginsburg or Justice Kennedy.