The potential first First Gentleman is reportedly "very agitated" by the possibility Vice President Joe Biden may challenge Hillary Clinton for the Democratic presidential nomination.

Politico detailed President Bill Clinton’s frustration with the state of his wife’s campaign in a piece out Wednesday:

Clinton’s camp, hands full with the email controversy and a surprisingly stout challenge from independent Vermont Sen. Bernie Sanders, isn’t in a patient mood. Bill Clinton, according to a person who has spoken with the former president in the last couple of weeks, is "very agitated" by the possibility of a Biden candidacy and incensed at the press hype around a possible bid. […] Either way, the Clinton campaign is monitoring Biden’s activities closely — and Biden’s small team is acutely sensitive to slights against him, and to the possibility that her operation — including Correct the Record and other Clinton-friendly outside groups — would push anti-Biden opposition research to reporters in order to dissuade the vice president from running. "They better not do that," said a Biden confidant. "That would bring really out his Irish."

The Clinton campaign has suffered from a dragging private email story that rather than go away, only grows. Her honesty and trustworthy numbers are underwater, and even a majority of Democrats who support her believe she will be hurt by the email scandal in a general election. Multiple polls have shown Clinton, once a 50-point frontrunner, now trails Sen. Bernie Sanders (I., Vt.) in New Hampshire.

Some aides believe Biden’s entrance to the race may energize a "lackluster" performance by their candidate so far.

President Obama reportedly gave his blessing to Biden run for president during a private lunch Monday. White House spokesman Josh Earnest lauded Joe Biden as the best political decision the president ever made, even over choosing Hillary Clinton to be secretary of state.