Rubio defended Trump's proposed territorial expansions as a 'national interest,' while Denmark and Greenland firmly rejected offers amid concerns over potential military action.

Secretary of State Marco Rubio states Trump's interest in Greenland and the Panama Canal is driven by national security concerns regarding China.

Secretary of State Marco Rubio said on Thursday that President Donald Trump's offer to “buy” Greenland is “not a joke”, adding that acquiring the semi-autonomous Danish territory was in the US “national interest”.

Florida Sen. Marco Rubio was confirmed by the Senate to be the next secretary of state Monday night, making him the first of President Trump's Cabinet picks to receive congressional approval.

The Senate voted on Monday to confirm Marco Rubio as President Donald Trump’s secretary of state, the first high-level Cabinet official for the new administration to be approved by the chamber.

President Donald Trump's interest in buying Greenland is "not a joke," Secretary of State Marco Rubio said in an interview on Thursday, adding that acquiring Greenland was in U.S. national interest and needs to be solved.