Marco Rubio Wins Puerto Rico Republican Primary, NBC News Projects

Rubio wins Puerto Rico primary; Sanders tops Clinton in Maine 2:43

Another day another primary. This time it was in Puerto Rico where residents of the tiny island chose Marco Rubio for the Republican Party's presidential nomination.

Marco Rubio won 74 percent of the vote. Donald Trump came in second place with 14 percent of the vote, while Ted Cruz obtained just 9 percent. Rubio won all 23 delegates available.

Residents of Puerto Rico can't vote in the general election but can vote in the party's primary to award candidates precious delegates. Only Florida Sen. Marco Rubio, who has won only one of 20 contests up until Sunday, spent any time campaigning there. He visited the U.S. territory Saturday for the second time.

Puerto Rico's primary comes the day after four states held their nominating contests Saturday when Texas Sen. Ted Cruz and Donald Trump each won two states, bringing the delegate total to: 392 for Trump, 305 for Cruz;, 130 for Rubio and 35 for Ohio Gov. John Kasich.

Related: NBC News' Complete Results Page

Puerto Rico has been facing economic crisis while the U.S. Congress has been debating what sort of assistance the U.S. government should provide. The territory faces an enormous $70 billion dollar debt and 12 percent unemployment.

Related: Ahead of Primaries Experts Promote Option to Tackle Puerto Rico's Debt