MSNBC's Mika Brzezinski and Joe Scarborough kept their long-standing feud with President Trump alive on Saturday, taking to Twitter to criticize Trump over his tweets about Puerto Rico and the mayor of San Juan.

"Poor leadership would be hiding at a country club golfing while fellow Americans are suffering and dying. She's not doing that. You are," Scarborough wrote.

Brzezinski followed suit, writing: "First the President attacks an American hero fighting for his life, now he attacks AMERICANS suffering through 2017's Katrina. #Hesnotfit"

Trump slammed San Juan Mayor Carmen Yulin Cruz and "others" for displaying "poor leadership" in hurricane relief efforts and accused the Democrats telling Cruz to be "nasty" to him.

The clash between Trump and the "Morning Joe" co-hosts flared up in June when the president made fun of the couple, including mocking Brzezinski's alleged face lift, from which she was "bleeding badly," and calling both journalists disparaging names.