Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE leads Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE in five battleground states, while Trump holds only a slight advantage in Arizona, according to a new round of surveys from the liberal-leaning Public Policy Polling (PPP).

The presumptive Democratic nominee has 4-point advantage over Trump in Pennsylvania, Ohio and New Hampshire, and she leads the businessman by 2 points in Iowa. Clinton’s largest lead is in Wisconsin, where she has a 47 percent to 39 percent advantage.

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President Obama won Iowa, New Hampshire, Ohio, Pennsylvania and Wisconsin in 2012, but they were among the closest contests in the nation.

The 2016 presidential race will be decided by who wins those five states, as well as Florida, Nevada, Virginia, Colorado and North Carolina.

Trump, the presumptive Republican nominee, is only currently favored to win in one of those states — North Carolina — which was also the only battleground state that Mitt Romney (R) carried in 2012.

Trump is campaigning in Pennsylvania on Tuesday and hopes to turn the Keystone State red for the first time since 1988.

But he may also have to commit time and resources to states like Arizona, Georgia and Utah, which have historically been Republican strongholds. Some recent polls show a closer-than-expected presidential race in those states.

The PPP data Tuesday has Trump with 44 percent support in Arizona compared with Clinton's 40 percent. That’s unchanged from the same survey in May, but many Republicans are troubled by how close the race is in a state that has only gone for the Democratic presidential candidate once in the last 64 years.

Sen. John McCain John Sidney McCainMomentum growing among Republicans for Supreme Court vote before Election Day McConnell urges GOP senators to 'keep your powder dry' on Supreme Court vacancy McSally says current Senate should vote on Trump nominee MORE (R-Ariz.), who has said he faces the toughest reelection race of his career, leads his likely Democratic opponent, Rep. Ann Kirkpatrick Ann KirkpatrickArizona Rep. Tom O'Halleran wins Democratic primary Arizona Rep. Ann Kirkpatrick wins Democratic primary Cook shifts 20 House districts toward Democrats MORE (D-Ariz.), 42 percent to 40 percent there.

The PPP surveys found voters in all of the battleground states would prefer Obama pick the next Supreme Court justice instead of Trump.

The closest state on that front is Arizona, which trusts Obama over Trump 46 percent to 45 percent on the Supreme Court issue. The largest disparity is in Wisconsin, where voters trust Obama over Trump 54 percent to 37 percent.

Senate Republicans have refused to allow a vote or a hearing for Merrick Garland, the judge President Obama nominated to replace Justice Antonin Scalia, who died in February.

They argue that because the next president should nominate his successor.

The PPP survey found that a strong majority of voters — more than 60 percent in each battleground state — support hearings for Garland, including a plurality of Republicans in Arizona, Iowa, Ohio and Pennsylvania.

The margins of support for Garland hearings are huge, and range from 38 points to 46 points. Those figures could put pressure on vulnerable Senate Republicans up for reelection.

The PPP surveys found incumbent Republican Sen. Kelly Ayotte Kelly Ann AyotteBottom line Bottom line Bottom Line MORE trailing Gov. Maggie Hassan (D) 44 percent to 42 percent in their Senate battle.

Incumbent Sens. Rob Portman Robert (Rob) Jones PortmanRomney undecided on authorizing subpoenas for GOP Obama-era probes Congress needs to prioritize government digital service delivery House passes B bill to boost Postal Service MORE (R-Ohio) and Pat Toomey (R-Pa.), meanwhile, have only 1-point leads over their challengers in the PPP surveys.

In Wisconsin, Sen. Ron Johnson Ronald (Ron) Harold JohnsonThe Hill's Morning Report - Sponsored by The Air Line Pilots Association - White House moves closer to Pelosi on virus relief bill Second GOP senator to quarantine after exposure to coronavirus GOP-led panel to hear from former official who said Burisma was not a factor in US policy MORE (R) is losing by double digits to former Sen. Russ Feingold (D), 50 percent to 37 percent.

Sen. Chuck Grassley Charles (Chuck) Ernest GrassleySenate Republicans face tough decision on replacing Ginsburg What Senate Republicans have said about election-year Supreme Court vacancies Biden says Ginsburg successor should be picked by candidate who wins on Nov. 3 MORE (R-Iowa) is performing the best among Senate Republicans being targeted by Democrats, leading his challenger, former Lt. Gov. Patty Judge (D), by 7 points.

The PPP survey was conducted between June 22 and 23.

Poll samples:

• Arizona: 691 registered voters, 3.7 percentage point margin of error.

• Iowa: 897 registered voters, 3.3-point margin of error.

• New Hampshire: 578 registered voters, 4.1-point margin of error.

• Ohio: 708 registered voters, 3.7-point margin of error.

• Pennsylvania: 980 registered voters, 3.1-point margin of error.

• Wisconsin: 843 registered voters, 3.4-point margin of error.