President-elect Donald Trump has been busy online, reacting to recount efforts, and issuing a warning about Cuba.

FOX's Rachel Sutherland reports from Washington:

The President-elect is threatening to terminate diplomatic relations with Cuba, tweeting that he wants the island nation to make a better deal for the Cuban and American people, and the U.S. as a whole.

Transition team adviser Kellyanne Conway told NBC'S "Meet the Press":

(Conway) "He wants to make sure we things in return and it's not always this unilateral capitulation to these foreign governments."

Mr. Trump, upset over recount efforts in three states, is also making claims of voter fraud on his Twitter account, saying he would have won the Popular Vote if millions hadn't voted illegally.

California's Secretary of State has dismissed charges of voter fraud there as "absurd".

In Washington, Rachel Sutherland, FOX News.

Follow Rachel Sutherland on Twitter: @SutherlandFOX