By Simon Lewis and Matt Spetalnick WASHINGTON (Reuters) -When Marco Rubio arrives in Latin America this weekend on his first foreign trip as Donald Trump's secretary of state, he'll find a region reeling from the new administration's shock-and-awe approach to diplomacy.

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

Panamanian President Jose Raul Mulino ruled out discussing control of the Panama Canal with U.S. Secretary of State Marco Rubio when he visits the Central American country. "I cannot negotiate and much less open a process of negotiation on the Canal,