The new secretary of state took center stage in a diplomatic rift with Colombia over deportation flights, adding teeth to Trump's threats of sanctions.

Former U.S. senator from Florida Marco Rubio jumps into new role as secretary of state with flurry of phone calls, planned trip to Panama.

Sen. Marco Rubio used his confirmation hearing Wednesday to warn a Senate panel that China might move against Taiwan before the decade is over and that a potential ceasefire agreement between Russia and Ukraine must provide the Ukrainians with sufficient leverage to deter a repeat invasion in the future.

Marco Rubio has been confirmed by the Senate for secretary of state with unanimous support. Now comes the hard part that could make or break his tenure: retaining the full backing of his new boss, Donald Trump.

Secretary of State Rubio spoke with China's Director of the CCP Central Foreign Affairs Commission and Foreign Minister Wang Yi.

More:Secretary of State Marco Rubio to visit Panama after Donald Trump lashes out at country Zelenskyy has shown interest in reaching a settlement, Trump noted. Putin could be harder to bring to ...

Zelenskyy described the U.S. as “the largest ... Trump's nominee for secretary of state, Marco Rubio, said during his confirmation hearing on Wednesday: "Even if the conflict ends, Ukraine ...

US diplomats have requested an urgent exemption for Ukraine-related programmes from a 90-day freeze on foreign aid and “stop work” orders issued by secretary of state Marco Rubio, according to documents seen by the Financial Times and people familiar with the matter.

Donald Trump highlights: Marco Rubio is the first member of Donald ... Donald Trump again criticized Ukrainian President Volodymyr Zelenskyy, saying that he was “no angel” and “shouldn ...

Trump signed a flurry of executive orders on his first day as US President, withdrawing the country from the Paris climate agreement and reversing sanctions on violent Israeli settlers.

Canadian Prime Minister Justin Trudeau said his country would respond if President Donald Trump pressed ahead with his threat to impose tariffs on the US’s northern neighbour. “Canada provides many of the necessary inputs that the American economy is going to need,” he said on Tuesday morning.