C Boyden Gray on the Fortas precedent the Dems keep bringing up:

The Fortas episode is different from the current situation for other
reasons. The Fortas filibuster lasted a little over a week. It slowed
down the deliberative process, but it did not bring it to a halt. Just
over three months in all elapsed between the date of nomination and
Justice Fortas’s decision to step aside as nominee for chief justice. By
comparison, the floor debate on Mr. Estrada’s nomination has been going
on for well over three months; and the nomination itself has been
pending before the Senate for over two years. Whatever else the Fortas
episode stands for, it does not provide senators with precedent for a
delay of this duration.

Read the whole June oped here.