Senate Majority Leader Mitch McConnell (R-Ky.) warned Democrats on Tuesday not to mess with the filibuster rule if they win control of the chamber in November.

He said eliminating the legislative filibuster by reducing the 60-vote threshold for passing bills to a simple majority would be a serious mistake.

“The important thing for our Democratic friends to remember is that you may not be in total control in the future, and anytime you start fiddling around with the rules of the Senate, I think you always need to put yourself in the other fellow’s shoes and just imagine what might happen when the wind shifts,” McConnell told reporters when asked about an uptick in discussions among Democrats about changing the filibuster rule if former Vice President Joe Biden wins the White House and they capture the Senate.