Polls released Sunday morning show real estate mogul Donald TrumpDonald John TrumpTrump says he doesn't want NYT in the White House Veterans group backs lawsuits to halt Trump's use of military funding for border wall Schiff punches back after GOP censure resolution fails MORE holding his leads in the early voting states of Iowa and New Hampshire, although those leads are smaller than one more ago.

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Trump leads former Hewlett Packard CEO Carly Fiorina among potential New Hampshire GOP primary voters by just 5 points, 21 to 16 percent, according to NBC News/Wall Street Journal/Marist pollsters.

Trump and Fiorina are trailed by former Florida Gov. Jeb Bush with 11 percent and Sen. Marco RubioMarco Antonio RubioTurkey says soldier killed despite cease-fire in Syria White House staggers after tumultuous 48 hours Erdoğan got the best of Trump, experts warn MORE (Fla.) and retired pediatric neurosurgeon Ben Carson with 10 percent apiece.

In September, Trump led Ohio Gov. John Kasich, his closest competitor at the time in New Hampshire, by 16 points, 28 to 12 percent.

In Iowa, Trump now leads Carson by 5 points, 24 to 19 percent. Fiorina follows with 8 percent, Bush with 7 percent and Sen. Ted CruzRafael (Ted) Edward CruzThe Hill's Morning Report - Presented by Better Medicare Alliance - Trump has had a rough October Hillicon Valley: GOP lawmakers offer election security measure | FTC Dem worries government is 'captured' by Big Tech | Lawmakers condemn Apple over Hong Kong censorship Lawmakers condemn Apple, Activision Blizzard over censorship of Hong Kong protesters MORE (Texas), Rubio and Louisiana Gov. Bobby Jindal with 6 percent each.

One month ago, Trump led Carson by 7 points in the Hawkeye State, 29 to 22 percent.

Among Democrats, Hillary ClintonHillary Diane Rodham ClintonSanders: 'Outrageous' to suggest Gabbard 'is a foreign asset' Clinton attacks on Gabbard become flashpoint in presidential race Saagar Enjeti: Clinton remarks on Gabbard 'shows just how deep the rot in our system goes' MORE maintains her lead among potential Iowa Democratic caucus-goers and Sen. Bernie SandersBernie SandersWarren to protest with striking Chicago teachers Sanders: 'Outrageous' to suggest Gabbard 'is a foreign asset' Democratic strategist: Sanders seeking distance from Warren could 'backfire' MORE (I-V.) is still the leader among potential New Hampshire Democratic primary voters.

Clinton leads Sanders by 11 points, 47 to 36 percent in Iowa. Former Maryland Gov. Martin O’Malley has 4 percent. Clinton’s lead in the Hawkeye State is only 5 points when Vice President Joe BidenJoe BidenTrump says he doesn't want NYT in the White House Warren to protest with striking Chicago teachers Schiff punches back after GOP censure resolution fails MORE is added to the field, however.

Sanders leads Clinton by 9 points, 48 percent to 39 percent, in New Hampshire in results that are virtually unchanged from a month ago. Biden gets 18 percent when added to the equation, while support for Sanders falls to 42 percent and Clinton gets 28 percent.

The NBC/WSJ/Marist polls were conducted Sept. 23-30. They have a 4.7 percent margin of error for potential Iowa GOP caucus-goers and a 5.3 percent margin of error for Democrats. In New Hampshire, their margin of error is 4.6 percent for potential GOP primary voters and 4.9 percent for Democrats.

Read more from The Hill:

Sanders maintains lead in New Hampshire