New poll finds Cruz narrowing Trump's SC lead
© Greg Nash

An NBC News/Wall Street Journal/Marist poll released Friday finds Donald TrumpDonald John TrumpKoch-backed group launches six-figure ad buy against Heitkamp Anti-abortion Dem wins primary fight Lipinski holds slim lead in tough Illinois primary fight MORE leading the GOP presidential field by only 5 points in South Carolina, down from 16 points a month ago.

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 CruzRafael (Ted) Edward CruzCruz says Cambridge Analytica assured him its practices were legal Dem battling Cruz in Texas: ‘I can understand how people think this is crazy’ Overnight Tech: Facebook faces crisis over Cambridge Analytica data | Lawmakers demand answers | What to watch for next | Day one of AT&T's merger trial | Self-driving Uber car kills pedestrian MORE, Trump's nearest rival, gets 23 percent, up from 20 last month.

Trump and Cruz are followed by Marco RubioMarco Antonio RubioRubio: McCabe 'should've been allowed to finish through the weekend' For Tillerson, bucking Trump became a job-killer At least six dead after pedestrian bridge collapses on cars in Florida MORE, with 15 percent; Jeb Bush, at 13 percent; and John Kasich and Ben CarsonBenjamin (Ben) Solomon CarsonBen Carson suggests wife made decision to purchase ,000 dining set The Hill's 12:30 Report Cost of Pruitt's Italy trip rises above ,000 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.