WASHINGTON — Florida Sen. Marco Rubio promised on Wednesday to implement President-elect Donald Trump's "America First" vision as secretary of state, vowing in his confirmation hearing that the incoming administration will forge a new path by placing American interests "above all else."

"Placing our core national interests above all else is not isolationism," Rubio told the Senate Foreign Relations Committee. "It is the commonsense realization that a foreign policy centered on our national interest is not some outdated relic."

"The postwar global order is not just obsolete; it is now a weapon being used against us," Rubio said.

It's a remarkable opening salvo from Rubio, who was born in Miami to Cuban immigrants and who, if confirmed, would become the first Latino to serve as the nation's top diplomat.

The confirmation hearing begins a new chapter in the political career of the 53-year-old Florida Republican, whose relationship with Trump has evolved over the last decade. Once rivals trading schoolyard insults as they campaigned for president in 2016, the two men became close allies as Trump campaigned for another White House term last year.

Rubio first came to Washington as part of the "tea party" wave in 2010 and once advocated for allowing a path to citizenship for immigrants in the country illegally. But like other Republicans, Rubio's views on immigration have shifted toward the hard-line stance of Trump, who has pledged to aggressively pursue deportations once he takes office on Monday.

Unlike many of Trump's Cabinet selections, Rubio is expected to easily win confirmation, notching support not only from Republicans but also Democrats who endorse him as a "responsible" pick to represent the U.S. abroad. Many expect he will be among the first of Trump's Cabinet picks approved.

Democratic Sen. Brian Schatz, who served alongside Rubio on the Foreign Relations Committee, said he has high hopes that the Florida Republican will reject the isolationist approach of other Trump allies.

"I think Marco is a hawk, but he's also an internationalist, and I think the challenge for him will be to maintain the long bipartisan tradition of America being indispensable in world affairs," the Hawaii lawmaker told The Associated Press. "And there are people in the Trump world who want us to run away from being the leaders of the free world. And I'm hoping that Marco's instincts towards American strength will win the day."

Rubio's approach to foreign affairs is grounded in his years of service on the Foreign Relations committee and the Senate Intelligence panel. In his speeches and writings, he's delivered increasingly stern warnings about growing military and economic threats to the United States, particularly from China, which he says has benefited from a "global world order" that he characterizes as obsolete.

China, Rubio told the committee, has "lied, cheated, hacked, and stolen their way to global superpower status, at our expense."

The Chinese Foreign Ministry on Wednesday declined to comment on Rubio's remarks.

If confirmed, Rubio will become the leader of U.S. foreign policy — though his role will surely remain secondary to Trump, who relishes the global stage and frequently uses the bully pulpit against America's allies.

Even before taking office, Trump has stirred angst in foreign capitals by threatening to seize the Panama Canal and Greenland and suggesting he will pressure Canada to become the nation's 51st state.

By winning another term, Trump has won an "unmistakable mandate from the voters," Rubio will say.

"They want a strong America. Engaged in the world. But guided by a clear objective, to promote peace abroad, and security and prosperity here at home."

A Biden administration decision to rescind Cuba's designation as a state sponsor of terrorism with just days left in office is likely to irk Rubio, who has long supported tough sanctions on the communist-run island.

Rubio's office did not respond to multiple queries Tuesday about the senator's reaction to the move, which many believe will almost certainly be reversed by the Trump administration.