Two sources at the top of the Donald Trump transition team confirmed to MSNBC that they spoke to the president-elect today and that Donald Trump was "furious" at Kellyanne Conway's comments Sunday suggesting Trump "betrayed" his supporters by even considering Mitt Romney for a position in his cabinet.

"Kellyanne went rogue at Donald Trump's expense at the worst possible time," a source familiar with Trump's thinking told MSNBC.



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Trump's top aides said they were "baffled" by Conway's comments and suggested that it feeds into a growing concern inside the campaign that "instead of driving Donald Trump's message, she's pushing her own agenda."



"It's dangerous," said a top transition aide.



Steve Bannon and Reince Priebus have reportedly been growing frustrated by Conway's failure to become a team player in a transition process where the top players are forming a tight knit group around the president-elect.



Conway, responding to MSNBC via text early Monday, denied the report, saying, "It is all false. And sexist."

Conway went on to say about her role in the transition: "I [can] have any job I want. May stay outside to take the Plouffe role and run the political operation. [Trump] wants me by his side."



Conway was referring to David Plouffe, President Barack Obama's 2008 campaign manager.

— CNBC contributed to this report.