Vice President Joe Biden will make a call about a potential 2016 White House run whenever he is ready and will not allow Hillary Clinton's presidential campaign to "bully" him into making a decision, an unidentified source described as a close confidant said over the weekend.

"He really does not care about John or anyone else," the source said in reference to John Podesta, Hillary Clinton's campaign chairman, according to ABC News. "He does not like bullies and will not be bullied. He has never really been part of the Democratic establishment and could care less about it."

The remarks come after Clinton, the Democratic Party's current front-runner, had seemed to urge the vice president to make a final determination on whether or not he will join the race. "Whether you are encouraging or not, there comes a time where a decision has to be made," the former secretary of state said on CNN's "State of the Union."

Nevertheless, Clinton was quick to caution that it was not her intention to make her former colleague hurry up, the news network noted. "Certainly, I'm not in any way suggesting or recommending that the vice president accept any timetable other than the one that is clicking inside of him," said Clinton, who served as a senator from New York when Biden represented Delaware.

A Democratic congressman from Pennsylvania, meanwhile, told the New York Daily News that the vice president had already made a call and was indeed going to challenge Clinton for their party's 2016 nomination, the newspaper reported.

"I have a very good source close to Joe (Biden) that tells me (that Vice President) Biden will run for (president)," Rep. Brendan Boyle noted on Monday morning on social media.

Others close to the vice president speculate that announcement may come as part of Saturday's Jefferson-Jackson fundraising dinner in Iowa, the New York Daily News added.

"There has to be an affirmative decision by Wednesday for him to be in town for the J-J dinner," an unnamed former Biden staffer explained. "He has until Wednesday to decide whether or not to go to Iowa and a short time after to decide whether or not to qualify for all the ballots. There aren't official deadlines, but these are practical deadlines."