NBC News: “Replacing Feinstein on the panel, even on a short-term basis, would require approval from the full Senate. Schumer could ask for unanimous consent on a resolution to make that happen, but any one Republican member could object and block it.”
“In that case, Democrats would have to go through a lengthy process to garner the 60 votes required to break a filibuster — meaning 10 Republicans would have to join the other 50 Democratic members to allow Feinstein’s replacement.”
“Five Republican aides involved in the process say GOP senators have not formalized a plan to address the Democratic request. But there appears to be broad consensus that Schumer and his colleagues will need to negotiate some sort of deal that Republicans would be willing to go along with, according to the aides.”