Sen. Lindsey Graham (R-S.C.) said Wednesday Senate Minority Leader Mitch McConnell (R-Ky.) should do anything he needs to stand up to the Democrats’ “radical agenda,” including denying quorum. “To borrow a phrase from Senator Schumer, when it comes to standing up to the most radical agenda in U.S. Senate history—All options are on the table for Republicans,” Graham wrote on Twitter. “Republican needs to make it clear that if there is an effort to change the filibuster … we, as Republicans, will use all the tools in the toolbox to stop the power grab—including the denial of a quorum.” Quorum refers to the number of senators that must be present for the Senate to do business. The Constitution requires a majority of senators (51) for a quorum. Democrats have recently been more vocal about getting rid of the Senate filibuster, an action that prolongs debate and delays a vote on a …