The White House on Thursday slammed three Senate Republicans for saying their party should refuse to take up any Supreme Court nominees submitted by Hillary Clinton if she becomes president.

At various points during the 2016 campaign, GOP Sens. Ted Cruz of Texas, Mike Lee of Utah and John McCain of Arizona have made such declarations.

White House Press Secretary Josh Earnest told reporters that those calls threaten “the same kind of dysfunction that has infected Washington for the last six years.”

[Republicans Split on Supreme Court Strategy in Lame Duck]

Senate Republicans since March have been blocking Judge Merrick Garland’s Supreme Court nomination, refusing to give President Barack Obama’s pick even a confirmation hearing, much less a vote on the floor. The party, however, appears divided about how to proceed.