Former Republican House Speaker Newt Gingrich slammed the Trump campaign, calling it "very self-destructive."
In an interview with Fox Business' "Mornings with Maria," Gingrich, who supports GOP nominee Donald Trump and was on the short list for vice president, said Trump is currently in a slump.
"Trump is still behaving like as though it was the primaries and there were 17 candidates," he said, according to Politico. "He has not made the transition to being the potential president of the United States, which is a much tougher league. People are going to watch you every single day. They’re going to take everything they can out of context, and he is not yet performing at the level that you need to."
Gingrich then compared the Trump campaign to the career of NFL Hall of Fame quarterback Joe Montana, who is in the middle of an interception-throwing slump.
"Trump is in that kind of a slump," Gingrich continued. "[He has] thrown a series of interceptions in the last week that really do not bode well for his campaign."
Trump's "slump" could be referring to a number of political gaffes he has made recently, which include mocking the parents of a fallen veteran, going against prominent Republicans like House Speaker Paul Ryan of Wisconsin and Arizona Sen. John McCain by not endorsing them in their current campaigns, joking about tossing a baby out of a rally and mistakenly saying that Russian President Vladimir Putin will not invade the Ukraine even though he took the country's Crimean peninsula back in 2014.
According to CNN, an anonymous source within the Republican party said some of Trump's campaign staff now feel as though "they are wasting their time."
Two other sources close to the Trump campaign say that Republican National Committee Chairman Reince Priebus has talked to Trump several times to convey the dismay of party leaders and top donors. Trump has been told that he is losing support within the party establishment and that donors are either backing out or telling the campaign that he appears toxic.
Gingrich maintains that a Trump presidency is still a possibility if the Republican presidential nominee can learn restraint and discipline.
"[Trump has] two huge advantages: One is the country really wants change, and the other is Hillary Clinton is the most corrupt and dishonest candidate we’ve ever had for president," said Gingrich. "There’s always going to be a residual possibility that Trump can win. The question is, can he, in August, slow down, take a deep breath and reorganize how he’s operating so that he gets to the standard of a potential president of the United States? He has not done that up to now."