As the final stretch of the campaign for the U.S. presidential elections hits the ground, Republican contender Donald Trump has lost one of his supposed biggest campaign donor - himself.

Trump has earlier pledged $100 million from his own pocket to fund on his campaign. But the data from U.S. Federal Election Commission revealed on Friday that the Republican candidate was way too far from $100 million threshold.

A CNN report revealed that Trump, amid frequent promises, has only shelled $31,000 in October for his campaign.

Throughout the campaign period, the GOP nominee only gave $56 million as of October 20, some $44 million short from his pledged amount. On Friday, he wired $10 million into his campaign account.

But even if Trump boosts his campaign coffers, political observers believed that with less than two weeks before the Election Day, it's already too late. For months, the Republican finance team have repeatedly called on Trump to have the cash arrive early as too late would have limited utility.

"Putting a lot into the ground game at this stage is smart, but it's hard to do," said Mike DuHaime, a budget adviser of the Republican National Committee.

But amid campaign fund woes, Trump said that his $100 million pledge remains correct while hinting that he could give more.

"I will have over $100 million in the campaign, and I'm ready to go much more than that," said Trump in a CNN interview.

Disclosure from U.S. Federal Election Commission revealed that the river of cash flowing toward the Republican Party has slowed down with relatively small amount coming from outside donors.

Others believed that the financial drought suffered by the Trump campaign is a sign that the Republican backers are now slowly conceding to Clinton.

While Trump may have spent around $2 million per month since winning the GOP nomination, his rival Hillary Clinton raised around $2.8 million a day and has over $62 million in her campaign account - four times bigger than the Republican has.