In 2013 in response to the Republicans rejecting President Obama's nominees, Senate Democrats reduced the vote to halt a filibuster to confirmation of certain government positions to 50 votes. Now, in response to the threat of Democrats blocking President Trump's SCOTUS nominee, Republicans are floating the idea of reducing the cloture to 50 votes for SCOTUS positions as well.
Is it possible for Congress to restore cloture rules back to the way they were, where it requires 60 votes to approve nominees? Please note, I'm not asking if the cloture will be restored, but whether through congressional procedures it can be restored.