GOP presidential hopeful Donald Trump and his Democratic counterpart, Hillary Clinton, have both successfully clung to their leads in the latest online election poll conducted by NBC News and SurveyMonkey.

According to the network, the online survey of registered voters had the real estate tycoon at 38 percent support among Republicans, trailed by Texas Sen. Ted Cruz (20 percent) and Florida Sen. Marco Rubio (11 percent). Clinton, meanwhile, led registered Democrats with 52 percent, while her closest challenger, Vermont Sen. Bernie Sanders, garnered 37 percent support.

Trump scores high among older males

Weeks before the crucial early races in Iowa and New Hampshire, Trump maintained a strong showing among each of the major age, demographic and income groups. The former "Apprentice" star's most adamant supporters, however, tended to be older males. He also performed well among those with a high school education or less, as well as those with an annual income under $50,000.

Clinton beat Sanders among both men and women, but her female support was particularly strong. Fifty-six percent of Democratic women backed the former secretary of state, while only 32 percent preferred the socialist senator. Among African-Americans and Hispanics, meanwhile, Clinton logged huge leads over all of her opponents.

Single digits for remaining contenders

In the crowded Republican field, meanwhile, no other candidate scored in the double digits in the poll conducted between Jan. 4 and Jan. 10 among a national sample of 9,746 adults: Retired neurosurgeon Ben Carson scored 9 percent; New Jersey Gov. Chris Christie, former Florida Gov. Jeb Bush and Kentucky Sen. Rand Paul each came in at 3 percent; and former HP executive Carly Fiorina, Ohio Gov. John Kasich and former Arkansas Gov. Mike Huckabee all received 2 percent.

The only remaining Democratic candidate besides Clinton and Sanders, former Maryland Gov. Martin O'Malley, for his part, was backed by 2 percent.

Between the once friendly front-runners Trump and Clinton, meanwhile, no love was lost at this point, the New York Daily News noted. The Democratic candidate --who had made a New Year's resolution to no longer comment on her Republican rival -- admitted on Monday that she did not bring a wedding gift when she attended Trump's 2005 nuptials.

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