The two could begin campaigning together in the battleground state of Florida in the next few weeks, the aide said, adding that Pence and Rubio have been in regular contact over the phone.
According to the Rubio campaign, no joint events are "scheduled at this time," but "Marco has tremendous respect and admiration for Governor Pence."
Eventually losing his home state to Trump in a landslide, Rubio said he would support the Republican nominee but later said he still didn’t think Trump could be trusted with the nuclear codes. Rubio added he planned to keep Trump in check in the Senate.
He also said he didn't plan on making any personal appearances with Trump.
"Not that I'm looking to undermine him, but I think the differences between us on key issues are so significant that I don't plan -- I've got to run my own race," Rubio told CNN in June.
Yesterday, Rubio said he supports Trump for president, but is not rescinding his previous remarks that Trump is a "con man."
"I’ve stood by everything I ever said in my campaign," Rubio said in an interview with the Miami Herald.