An NBC News/Wall Street Journal/Marist poll released Friday finds Donald Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE leading the GOP presidential field by only 5 points in South Carolina, down from 16 points a month ago.

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The RealClearPolitics average of polls still finds Trump ahead of the pack by double digits going into Saturday’s South Carolina primary, but Friday’s survey reports Trump has 28 percent support among likely Republican voters, down from 36 percent in January. Ted Cruz Rafael (Ted) Edward CruzLoeffler calls for hearing in wake of Netflix's 'Cuties' Health care in the crosshairs with new Trump Supreme Court list 'Parks and Rec' cast members hosting special reunion to raise money for Wisconsin Democrats MORE, Trump's nearest rival, gets 23 percent, up from 20 last month.

Trump and Cruz are followed by Marco Rubio Marco Antonio RubioFlorida senators pushing to keep Daylight Savings Time during pandemic Hillicon Valley: DOJ indicts Chinese, Malaysian hackers accused of targeting over 100 organizations | GOP senators raise concerns over Oracle-TikTok deal | QAnon awareness jumps in new poll Intelligence chief says Congress will get some in-person election security briefings MORE, with 15 percent; Jeb Bush, at 13 percent; and John Kasich and Ben Carson Benjamin (Ben) Solomon CarsonBiden cannot keep letting Trump set the agenda The Hill's 12:30 Report: Trump heads to New Hampshire after renomination speech Five takeaways on GOP's norm-breaking convention MORE tied, at 9 percent.

Cruz leads Trump among self-identified Tea Party supporters, 35 percent to 31 percent. No other candidate registers above Rubio’s 13 percent support among the Tea Party.

However, only 8 percent of Trump supporters report they “might vote differently” on Saturday, compared to 15 percent of those backing Rubio and Cruz and 22 percent of Bush backers.

Trump is looking to build on his momentum Saturday after a decisive win in the New Hampshire primary earlier this month.