Threat Against Marco Rubio, Vice President Hopeful - Under Investigation

U.S. Capitol Police are investigating a threat against Florida Republican Sen. Marco Rubio, who has been considered a possible running mate to Mitt Romney in the future presidential elections.

Rubio has gained quick popularity despite it being his first year in Senate, once it was revealed that he was Romney's most likely pick for vice president. However, taking criticism of the GOP candidate to the next level, a new report has confirmed that Rubio has now become the victim of a threat.

Although Rubio's office released little information about the possible threat, police protection was ordered with an around the clock watch by Secret Service agents. The case has also fallen under police investigation.

"We are working with local law enforcement in Miami. USCP currently has an active open investigation re: the report of a threat against Sen. Rubio," Lieutenant Kimberly Schneider, a spokesperson for the Capitol Police, told CBS news by email.

Romney's interest in Rubio reveals his need in the coming elections to secure Latino voters. In the same effort, Romney has endorsed three major Cuban-American leaders - Congresswoman Ileana Ros-Lehtinen, Congressman Mario Diaz-Balart and former Congressman Lincoln Diaz-Balart.

The GOP candidate has also used his family history to give an example of his mixed background and thus ability to understand the issues that many Hispanics may face.

"You probably did not know that my dad was not born in this country - he was born in Mexico," Romney said in a speech at Conchita Foods in Miami. "And at age 5- or 6-year-old, because of revolution in Mexico, my dad's dad came back to the United States and began a construction business. Didn't go so well, actually, not as well as Conchita has gone. He went bankrupt more than once."

Rubio's next public outing is scheduled for today, where the vice president hopeful will give a speech at the Brookings Institution in Washington concerning "the way in which the current administration has chosen to engage" the world.