A nonprofit backing Marco Rubio has raised almost $16 million, parts of which the group plans to invest in television advertisements for the Republican Florida senator's 2016 White House bid,

According to Politico, The Conservative Solutions Project, which operates separately from Rubio's political-action committee, disclosed that it was on track to reaching its overall fundraising goal of $25 million.

"With more than $15.8 million raised already, Conservative Solutions Project is nearly two-thirds of the way to our overall fundraising goal," the nonprofit's president, Pat Shortridge, said in a statement. 

He added, "These funds will allow us to continue the fight to restore our military and our nation's role in the world, and given the recent news about the nation's stagnant economy, advocate for conservative solutions to an inefficient tax code and education reform so all Americans have a chance to pursue their dreams."

Conservative Solutions, which has already spent $1 million on television commercials, said on Monday it would boost its advertising campaign to a total of $3.3 million, according to CNN. Some of the group's early spots, the advertisements focused on Rubio's attacks on the Obama administration's proposed nuclear deal with Iran, an issue The New York Times called "critical" for some of the most generous GOP donors.

The group's announcement reveals that Rubio is "the biggest beneficiary so far of a new and largely untested means for moving unlimited cash into presidential primary campaigns," The New York Times noted.

Meanwhile, the Conservative Solutions Project is taking care of many activities typically carried out by a formal presidential campaign, and that includes what the paper called "extensive research on the Republican primary electorate."

Supporters of other contenders in the increasingly crowded field for the Republican nomination -- including former Florida Gov. Jeb Bush, former Texas Gov. Rick Perry, Louisiana Gov. Bobby Jindal and former Arkansas Gov. Mike Huckabee -- have set up similar groups and used them as "de facto campaigns prior to their kickoff events," CNN noted.