Trump seemed to jokingly muse over making such power consolidation moves himself, according to audio from the closed-door event at his Mar-a-Lago resort published by news outlet CNN.
"He's now president for life," the 71-year-old US president said, eliciting chuckles from the crowd of Republican donors. "And look, he was able to do that. I think it's great."
He garnered even more laughs when he quipped: "Maybe we'll have to give that a shot some day."
"Whether this was a joke or not, talking about being President for life like Xi Jinping is the most unAmerican sentiment expressed by an American President," said Democrat Ro Khanna, a California congressman.
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"George Washington would roll over in his grave."
China's legislature will hold an annual session starting tomorrow that will grant Xi a second five-year stint as president -- and also likely scrap the constitution's limits on holding the office, clearing the way for him to rule for life.