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Biden leads Trump by 6 points in Michigan and Nevada, race tied in Iowa: poll

Democratic presidential nominee Joe BidenJoe BidenBiden adds to vote margin over Trump after Milwaukee County recount Krebs says allegations of foreign interference in 2020 election 'farcical'  New DOJ rule could allow executions by electrocution, firing squad MORE holds a steady lead over President TrumpDonald John TrumpBiden adds to vote margin over Trump after Milwaukee County recount Krebs says allegations of foreign interference in 2020 election 'farcical'  Republicans ready to become deficit hawks again under a President Biden MORE in the key battlegrounds of Michigan and Nevada, while the race remains a dead head in Iowa, according to a new poll.

A CBS News-YouGov tracking poll taken between Oct. 6 and Oct. 9 found Trump trailing Biden by 6 points among registered voters in Michigan and Nevada, 52 percent to 46 percent in both states. In Iowa, both candidates registered support from 49 percent of registered voters.

The polls paint a bleak picture for the president, whose 2016 victory was largely made possible by a narrow win in Michigan, while former Secretary of State Hillary ClintonHillary Diane Rodham ClintonValadao unseats Cox in election rematch Trump says he'll leave White House if Biden declared winner of Electoral College Federal workers stuck it out with Trump — now, we're ready to get back to work MORE (D) won Nevada by less than 3 points. Trump won Iowa comfortably in 2016.

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Democrats also hold the edge in two Senate races measured by the CBS-YouGov poll.

In Michigan, Sen. Gary PetersGary PetersRepublican John James concedes in Michigan Senate race Hillicon Valley: YouTube suspends OANN amid lawmaker pressure | Dems probe Facebook, Twitter over Georgia runoff | FCC reaffirms ZTE's national security risk Democrats urge YouTube to remove election misinformation, step up efforts ahead of Georgia runoff MORE (D) leads Republican challenger John James 47 percent to 44, while in Iowa, Democratic challenger Theresa Greenfield leads incumbent Sen. Joni ErnstJoni Kay ErnstThe Memo: Trump plows ahead with efforts to overturn election More conservatives break with Trump over election claims Peggy Noonan: 'Bogus dispute' by Trump 'doing real damage' MORE (R) 47 percent to 43 percent.

Biden is buoyed in Nevada by a 2-to-1 advantage over the president among Hispanic voters, according to the poll, and he holds a 9-point lead among independent voters in Michigan.

The CBS-YouGov poll surveyed 1,048 registered voters in Iowa, with a margin of error of 3.5 percentage points; in Michigan, 1,215 were polled, with a 3.2 percentage point margin of error; and in Nevada, 1,052 answered, with a margin of error of 4.1 percentage points.