Polls released Sunday morning show real estate mogul Donald TrumpDonald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance 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 lawmakers distance themselves from Trump comments on transfer of power McConnell pushes back on Trump: 'There will be an orderly transition' Graham vows GOP will accept election results after Trump comments 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 - Sponsored by Facebook - Trump previews SCOTUS nominee as 'totally brilliant' Cruz blocks amended resolution honoring Ginsburg over language about her dying wish Trump argues full Supreme Court needed to settle potential election disputes 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 ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE maintains her lead among potential Iowa Democratic caucus-goers and Sen. Bernie SandersBernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome 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 BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio 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