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President Trump said Puerto Rico must cooperate more with the federal government on Hurricane Maria recovery efforts.

"Their truck drivers have to start driving ... On a local level they have to give us more help," the president told reporters at the White House just before departing for Puerto Rico.

The president and the mayor of devastated San Juan, Puerto Rico took shots at each other after Mayor Carmen Yulín Cruz accused the federal government of "killing us with the inefficiency."

Trump hit back saying the Democratic mayor has "poor leadership" and was listening to Democrats telling her to be "nasty to Trump."

However, Cruz' more recent attitude is more toned down, Trump said.

"I think she’s come back a long way; I think it’s now acknowledged what a great job we’ve done, and people are looking at that," the president said.

"In Texas and in Florida, we get an A-plus," he said of relief efforts for Hurricanes Harvey and Irma. "And I'll tell you what, I think we've done just as good in Puerto Rico, and it's actually a much tougher situation."

He praised first responders and the Federal Emergency Management Agency for doing an "incredible job" in Puerto Rico.

"I appreciate the governor and his comments," Trump added. "He has said we have done an incredible job, and that's the truth."

"The administration has answered and has complied with our petitions in an expedited manner," Puerto Rico Gov. Ricardo Rossello remarked.

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