Governor Chris Christie warned President Donald Trump to be “selective” in his criticism of Senate Majority Leader Mitch McConnell and House Speaker Paul Ryan in order to keep a good relationship with the Republican legislative leaders.

“I think you have got to be selective when you do it, because, in the end, you need to be able to work with these folks,” the New Jersey Governor told Fox News’ Neil Cavuto in a telephone interview Tuesday. ” Mitch McConnell is not going anywhere. Paul Ryan is not going anywhere. And so you don’t want to burn those bridges. Have a policy disagreement, but don’t make it personal.”

Christie’s comments come after several instances where Trump publicly disparaged congressional leadership, particularly McConnell, for failing to accomplish key legislative victories like repealing and replacing Obamacare.

“Can you believe that Mitch McConnell, who has screamed Repeal & Replace for 7 years, couldn’t get it done. Must Repeal & Replace ObamaCare!” Trump tweeted on August 10, one of seven times he wrote about the Senate Majority Leader on his twitter feed in July and August.