Mr Trump has stepped up his use of vulgar slurs to antagonise Allies worried swing voters

Republican presidential candidate Donald Trump's repeated insults and vulgarity in the countdown to Election Day may be relishing to his supporters, but it could turn off undecided voters.

The New York Times reported that Trump on Saturday (October 19) at a campaign rally in the key swing state of Pennsylvania, referring to American professional golfer Arnold Palmer, implied that his sexual organs were "huge" and continued to insult Democratic presidential candidate Harris.

Mr. Trump has come across as increasingly outspoken and inconsequential, and some of Mr. Trump's Allies and aides worry that his scattershot style is costing him the support of some swing voters.

It was not clear whether Mr. Trump's insults were motivated by his frustration with the campaign or by his desire to please voters. When Harris attended the campaign event on the 19th, he called on voters to pay attention to Trump's tendency to be full of grievances and "often go off script and chatter."

Addressing the crowd at an airport in Latrobe, Pennsylvania, Trump spent 12 minutes talking about Palmer, a golfer who grew up in the small Pennsylvania town where Trump's airport is named after him.

Calling Palmer, who died in 2016, "very manly," Trump said: "I hate to say it, but all the other golfers who used to share the shower with Palmer came out and they were like, 'Wow.'"

Trump then described Harris with an expletive beginning with the letter S, calling the Biden-Harris four years a bad four years. Looking around the hundreds of people he said: "We have been through terrible... Just think about it... Everything they touch becomes..."

As Trump paused, many in the audience -- mostly adults, but also children, babies and teenagers -- quickly responded: "Shit!"

Minutes later, Trump called on his supporters to come out and vote, telling them they had to send a rough signal to Harris, telling her: "We can't stand you, you're a lousy vice president."

In an exclusive interview with African American Baptist pastor and civil rights leader Al Sharpton on MSNBC, Harris said Trump's vulgar comments "demean" the presidency and said he was not qualified to serve as president of the United States again.

"The American people deserve a good president," Harris told Sharpton, according to a transcript of the interview released by MSNBC. She said: "Donald Trump must never be president of the United States again. He doesn't have what it takes. He does not meet the requirements of the president. That's why he's going to lose."