Puerto Rico Republicans used their sole vote in this year's presidential election to show overwhelming support for Florida Sen. Marco Rubio.

Rubio took about 74 percent of the vote in Sunday's primary, winning each of the 23 delegates the U.S. territory offered. Republican front-runner Donald Trump placed second with 13.6 percent of the vote, followed by Texas Sen. Ted Cruz (nine percent) and Ohio Gov. John Kasich (1.4 percent).

The Cuban-American senator was the only GOP candidate stumping in Puerto Rico.

"We continue to play the delegate math in this campaign, because we understand that this country is going to be a very different kind of primary, where the delegates are going to county," Rubio told reporters on Saturday. "That's why I'm here tonight in Puerto Rico, that's why we're going to continue to campaign in Florida."

Puerto Rico's Influence

Puerto Ricans can't participate in November's general election, but they can play a pivotal role in deciding who makes it as far.

The territory's 23 delegates are more than Vermont and just as many as New Hampshire. Exit polling information is scare but a CNN projection found each of the island's eight electoral districts - including the tourist district of San Juan - chose Rubio by an average of 73.8 percent. About 6,500 inmates are eligible to vote, but their selections won't be available until Wednesday.

According to the Pew Research Center, there is a disproportionate number of people leaving Puerto Rico for the U.S. mainland. The number of migrants coming to the U.S. reached 84,000 in 2014, compared to about 20,000 going the other way, thanks in large part to fears that the Puerto Rican government can't escape their worsening recession.

There are millions of Puerto Ricans now living in Florida. How this affects Rubio, and who is ultimately elected GOP presidential nominee, depends on how they vote in the Sunshine State's upcoming primary.

Rubio All-In on Florida

Sunday's win gives Rubio a total of two wins this election season, counting the Minnesota caucus he won on Super Tuesday.

Regardless, the Florida senator still trails Trump by 233 delegates. Momentum following strong showings in early primary and caucus states didn't translate to Super Saturday when Rubio didn't finish better than third place; he didn't win a single state and missed the delegate threshold in two of them.

Rubio's decelerating campaign prompted Trump and Cruz to argue that it's time for Rubio to drop out, the latter urging Rubio's supports if Republicans want a viable opponent to Trump.

Rubio, for his part, vowed to keep fighting.

"I've been an underdog before. It' didn't stop me then, and it won't stop me now," Rubio posted to Twitter on Sunday.