"If he comes in, Carson City would become a ghost town, and the Christmas season will be canceled," Trump said.
Trump and Biden were courting early voters on Sunday in the competitive states of Nevada and North Carolina, as the final presidential debate looms later this week.
Some 27.7 million Americans have already cast ballots either by mail or in person ahead of the Nov. 3 election, according to the U.S. Elections Project at the University of Florida. The record-shattering figure is being driven in part by concerns about crowds at polling sites on Election Day amid the coronavirus pandemic.
Trump, a Republican, was spending his Sunday in Nevada, a state he hopes to wrest away from Democrats after narrowly losing it in 2016. Early in-person voting in the state began on Saturday.
Trump will campaign every day leading up to Thursday's debate in Florida, including stops in Arizona and North Carolina, campaign spokesman Tim Murtaugh said.
While Trump lags in opinion polls at a national level and in many battleground states, Biden campaign manager Jen O'Malley Dillon said over the weekend that the national figures are misleading because must-win states are close.
[MUSIC - "GOD BLESS THE USA"]
God bless the USA.
DONALD TRUMP: Under the Biden lockdown, the lights of Reno and Las Vegas were extinguished. Carson City will become a ghost town. If he comes in, Carson City will become a ghost town.
And the Christmas season will be canceled. Thank you.