Billionaire media mogul Rupert Murdoch welcomed word that U.S. Vice President Joe Biden may be considering a 2016 presidential run. The executive co-chairman of News Corp. and executive co-chairman of Twenty-First Century Fox Inc. suggested Sunday Biden's potential entry could spice up the race among Democratic Party candidates, a field thus far dominated by former Secretary of State Hillary Clinton.

Murdoch expressed his opinion about the presidential contest via Twitter:

Biden and his advisers have begun conservations with Democratic campaign contributors who are either not committed to Clinton or are growing concerned that she may not win the White House, the New York Times reported, citing anonymous sources.

According to a Biden adviser cited by the Times, the vice president was "deeply moved" by his late son Beau Biden's desire for him to enter the race. Beau Biden died at the age of 46 in May, and he had attempted to make his father promise he'd vie for the White House, Times columnist Maureen Dowd separately reported.

The news of Biden's potential run arrived as Clinton's ratings continue to slip. The candidate recorded her worst-ever favorability score in a Quinnipiac University National poll whose results were released Thursday. Just 40 percent of registered voters viewed her favorably -- down from a high of 61 percent in February 2013.

Clinton also lost ground in the polls to the top three Republican candidates: billionaire real-estate mogul Donald Trump, Wisconsin Gov. Scott Walker and former Florida Gov. Jeb Bush. Her scores on "honesty and caring" were on par with those for Trump, the Quinnipiac poll found.

Still, Clinton maintains the lead among Democratic candidates, with support from 55 percent of Democratic voters nationwide. U.S. Sen. Bernie Sanders, Ind.-Vt., is in second place, with 17 percent support, while Biden is in third, with 11 percent support, according to the survey.