New Jersey Gov. Chris Christie is well known to be good friends with MSNBC “Morning Joe” co-hosts Joe Scarborough and Mika Brzezinksi. And his reputation as a pragmatic political aisle-crosser goes appreciated among the other left-leaning on-air talent at the network.

That may have changed this weekend after Christie’s office called the network “partisan” and “hostile” to the governor, according to the New York Times:

“There is a difference between treating this matter seriously and seeking out the truth and irresponsibly using hearsay and conjecture without confirming the facts,” Colin Reed, a spokesman for Mr. Christie, said on Sunday. Feelings are frayed on both sides. Mika Brzezinski, a co-host of MSNBC’s “Morning Joe” who makes no secret of her affection for Mr. Christie, seemed taken aback by the governor’s harsh critique.

“I was a little surprised when he took a jab at us,” she said in an interview on Sunday.

“I don’t think it’s legitimate to say this is a partisan attack,” she added. “I think this is a very real story, with legs.” …

Mr. Christie, who is known to be sensitive to slights, appears to be genuinely stung by the network’s coverage. But his outrage is also fueled by opportunism, Republican strategists say: The same brand of politics that appealed to the liberal anchors on MSNBC has antagonized conservatives around the country, whose support he will need to mount a White House run.