Harris has a four-point edge over Trump, 52%-48%, in the latest CBS News/YouGov poll of likely voters taken Sept. 18-20—but her lead shrinks to just 51%-49% in the seven states that are likely to decide the electoral college winner (Pennsylvania, Wisconsin, Michigan, Arizona, Georgia, Nevada and North Carolina).

It’s a marginal change from a month ago, when CBS and YouGov showed Harris ahead by three points nationally (51%-48%) and tied with Trump in the swing states.

Harris and Trump are tied at 47%, according to a New York Times/Siena poll of likely voters released Sept. 19 that found the majority of voters in every demographic gave positive reviews of Harris’ debate performance, with 67% overall saying she did well, compared to 40% who said the same about Trump (Trump led Harris 48%-47% in Times/Siena surveys from early September and late July).

Two other polls from Sept. 19 show Harris with a slight edge: She’s up by four points (49%-45%) in a YouGov/Economist survey of registered voters, and two points (50%-48%) in Fox News’ likely voter survey, a small shift after Harris trailed by one point in an early August Fox poll and led by just two points in an early September YouGov poll.

Harris led Trump by three points, 48% to 45%, with 8% undecided, in a new Forbes/HarrisX survey of 3,018 registered voters taken Sept. 11-13 (margin of error 1.8), after the two were tied at 45% with 10% undecided in a pre-debate HarrisX survey of 1,003 registered voters taken Sept. 9-10 (margin of error 3.1).

In a Monmouth University poll of 803 registered voters taken Sept. 11-15 (margin of error 3.9), 49% said they will definitely or probably vote for Harris, while 44% said the same about Trump—results that nearly mirror the group’s August survey that found Harris leading 48% to 43%.

Harris leads Trump 51% to 45% in Morning Consult’s likely voter survey taken Sept. 13-15, a three-point increase since before the Sept. 10 debate and her widest lead yet in the group’s weekly surveys (Harris led 50% to 45% among likely voters in a one-day Morning Consult poll taken Sept. 11, immediately after the debate).

Harris was up 52%-46% among likely voters and 51%-47% among registered voters in an ABC News/Ipsos poll taken days following the debate on Sept. 11-13, essentially unchanged from her six-point leads with likely voters in late August and early August ABC/Ipsos surveys—even though 63% of Americans said Harris won last week’s debate.

Also after the debate, Harris led by a five-point margin—47% to 42%—in a two-day Reuters/Ipsos poll of registered voters that closed Sept. 12, (in late August, a Reuters/Ipsos poll showed Harris with a 45%-41% advantage).

Pre-debate surveys found Harris’ polling surge appeared to be plateauing, including a NPR/PBS/Marist survey of registered voters taken Sept. 3-5 that found Harris led Trump 49% to 48%, down from a three-point lead in August, though she still led him by three points, 51% to 48%, among those who say they definitely plan to vote.

Harris was up by two points, 47% to 49%, in a Sept. 3-4 Emerson College survey of likely voters, a slight decline from her four-point lead in Emerson’s August poll.

In a Wall Street Journal poll released Aug. 29, Harris led Trump 48%-47% head-to-head, marking the first time in over a year Trump has trailed in a Journal survey—a reversal from Trump’s 49%-47% edge a month prior (the poll surveyed registered voters from Aug. 24-28, margin of error 2.5 points).

The vice president led Trump by five points—48%-43%—among likely voters in a Suffolk/USA Today poll taken Aug. 25-28, a massive shift from Trump’s 41%-38% lead over President Joe Biden shortly after Biden’s rough debate performance in June (the latest survey’s margin of error is 3.1 points).