Polls released Sunday morning show real estate mogul Donald TrumpDonald TrumpMan sentenced to nearly four years for running scam Trump, Biden PACs Meadows says Trump's blood oxygen level was dangerously low when he had COVID-19 Trump endorses David Perdue in Georgia's governor race 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 RubioGOP senators introduce bill targeting Palestinian 'martyr payments' House to vote on Uyghur bill amid diplomatic boycott of Beijing Olympics This week: Congress poised to go into December overtime 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 CruzGOP senators introduce bill targeting Palestinian 'martyr payments' Bob Dole: heroic, prickly and effective Democrats see Christmas goal slipping away 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 ClintonRepublican Ohio Senate candidate slams JD Vance over previous Trump comments Budowsky: Why GOP donors flock to Manchin and Sinema Countering the ongoing Republican delusion MORE maintains her lead among potential Iowa Democratic caucus-goers and Sen. Bernie SandersBernie SandersStudy: Test detects signs of dementia at least six months earlier than standard method The Hill's Morning Report - Presented by Uber - Omicron tests vaccines; Bob Dole dies at 98 Democrats see Christmas goal slipping away 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 BidenMan sentenced to nearly four years for running scam Trump, Biden PACs Dole in final column: 'Too many of us have sacrificed too much' Meadows says Trump's blood oxygen level was dangerously low when he had COVID-19 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