Hillary Clinton is statistically tied with Donald Trump in Colorado’s Jefferson County, another key battleground. | AP Photo Polls: Trump holds edge in several battleground counties

Donald Trump holds commanding leads over Hillary Clinton in two of the most pivotal counties on the swing state map, according to polling released Thursday by Axiom Strategies, the firm of Ted Cruz’s former campaign manager Jeff Roe.

Trump’s largest lead — 51 percent to 34 percent — is in Nevada’s Washoe County, the state’s most populous area outside of Las Vegas’ Clark County. The lead would represent a dramatic departure from the past two presidential elections, when President Barack Obama narrowly carried Washoe. Trump also holds a double-digit advantage in northeastern Pennsylvania’s Luzerne County.

Hillary Clinton is statistically tied with Trump in Colorado’s Jefferson County (Denver suburbs), Ohio’s Hamilton County (Cincinnati), Florida’s Hillsborough County (Tampa) and Virginia’s Loudoun County (D.C. suburbs). All four counties, along with Washoe (Reno) and Luzerne (Wilkes-Barre), are included among POLITICO’s 25 battleground counties to watch .

Axiom selected counties based on their history of correctly picking the statewide election winner in each of the past four elections and whether the county came close to predicting the statewide margin in those races.

The firm surveyed four other counties not on POLITICO’s list: Pennsylvania’s Northampton County, Ohio’s Sandusky County, Wisconsin’s Door County and North Carolina’s Watauga County. Trump holds high single-digit leads in three of those places while Clinton holds a 49-40 lead in Door County, according to the new polls.

The polls were conducted using a combination of live and automated calls. The polls were all in the field from Sept. 6-7 — prior to Clinton’s Sept. 11 health scare — and included a wide range of sample sizes.