Hillary ClintonHillary Diane Rodham ClintonDemocratic insiders stay on the sidelines in 2020 race Hillicon Valley: Twitter falling short on pledge to verify primary candidates | Barr vows to make surveillance reforms after watchdog report | DHS cyber chief focused on 2020 The Hill's Campaign Report: High stakes at last Democratic debate before Super Tuesday MORE has a substantial lead over Donald TrumpDonald John TrumpWinners and losers from the South Carolina debate Five takeaways from the Democratic debate Democrats duke it out in most negative debate so far MORE in four key battleground states, according to new polls released Friday.

Clinton leads Trump in Florida, North Carolina, Virginia and Colorado — the last two by double digits — in the NBC News/Wall Street Journal/Marist polls.

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The Democratic presidential nominee leads by a whopping 14 points in Colorado, 46 to 32 percent, and 13 points in Virginia, 46 to 33 percent.

She has somewhat slimmer leads over Trump in North Carolina, where she's ahead 48 to 39 percent, and Florida, where she leads 44 to 39 percent.

Trump has sought to regain his footing in the race after falling behind Clinton in a series of national and battleground state polls in recent weeks, following several controversies surrounding his own statements.

The polling was conducted Aug. 4–10. The margin of error for the 899 registered voters in Colorado is 3.3 points, the margin for the 862 in Florida is 3.3 points, the margin for the 921 in North Carolina is 3.2 points and the margin for the 897 in Virginia is 3.3 points.
 
The figures come on the heels of other polls by the same group this week showing Clinton leading Trump in the battleground states of Pennsylvania, Iowa and Ohio. 
 
Separate polling from Quinnipiac University also found Clinton leading in Pennsylvania and Ohio, though it showed her with just a 1-point lead in Florida.
 
 
Trump has faced a tumultuous stretch since last month’s Republican National Convention, entering into a series of controversies and seeing a steady stream of Republicans announce they won’t back him in November.
 
The businessman was criticized by both sides this week after discussing the possibility that “Second Amendment people” could prevent Clinton from nominating liberal justices to the Supreme Court. His campaign later tried to clarify that he wasn’t suggesting violence.
 
Trump also drew controversy this week by repeatedly claiming President Obama was the “founder” of the Islamic State in Iraq and Syria. He dismissed criticism of the remark on Friday, claiming it was “sarcasm.”
 
Last week, he claimed repeatedly to have seen a video of the U.S. sending money to Iran before later walking back his claim and saying he was talking about a hostage plane in Switzerland.
 
Trump's attacks on Khizr Khan, the father of a soldier killed in Iraq, provoked bipartisan criticism after Khan denounced him at the Democratic National Convention last month.
 
The GOP nominee gave Republicans heartburn last week when he declined to endorse House Speaker Paul RyanPaul Davis RyanPaul Ryan says he disagrees with Romney's impeachment vote Trump doubles down on Neil Cavuto attacks: 'Will he get the same treatment as' Shep Smith? Trump lashes out at Fox News coverage: 'I won every one of my debates' MORE (R-Wis.) for reelection and took shots at Sens. Kelly AyotteKelly Ann AyotteLobbying World On the Trail: Senate GOP hopefuls tie themselves to Trump GOP fears Trump backlash in suburbs MORE (R-N.H.) and John McCainJohn Sidney McCainMeghan McCain says Steyer should drop out: 'I hate that guy' Sanders says idea he can't work with Republicans is 'total nonsense' GOP casts Sanders as 2020 boogeyman MORE (R-Ariz.), both of whom are facing tough reelection fights. 
 
Trump eventually reversed himself and endorsed Ryan, who won his primary this week. But the week of drama cast doubt on GOP unity following the party's convention, where they hoped to emerge united heading into the fall.
 
Updated at 12:25 p.m.