As most of us are likely aware, Democrats are looking for any possible way they can delay the Senate taking up a replacement for Ruth Bader Ginsburg so that the next president can decide who should be in the seat. But with the removal of the filibuster, there are no meaningful ways for the minority party to express dissent.
That said, Senate committee rules are fairly bureaucratic, and there are several prerequisites for the Senate Judiciary Committee to consider a judicial candidate. One of them requires that at least two members of the minority party (and at least seven of the majority) be present in order for the committee to conduct business. Democrats could simply not show up and thus delay the Committee's approval of the Supreme Court nominee.
Obviously, Republicans would not want that to occur, and as they have the majority, likely have the power to unilaterally change internal rules. But how difficult is it to do so?