For Trump voters, shock, disappointment and disbelief.

Jodi Lavoie-Carnes, 48, a dental hygienist who lives in Dover, N.H., supported President Trump for re-election. On Saturday, she was shocked and disturbed by the boisterous celebrations of Biden supporters, who had gathered in her town waving profane anti-Trump signs.

The tone was so negative that she wondered what lies ahead for the country.

“I’m like, are you serious?” said Ms. Lavoie-Carnes, who ran unsuccessfully as a Republican for the New Hampshire State House this year. “The language doesn’t need to be there. My children need to drive by that.”

She said it was President-elect Joseph R. Biden Jr.’s responsibility to keep the tone of celebrations civil.

“Now you’re an elect, so calm them down,” she said.

Around the country, Trump supporters greeted news that Joseph R. Biden Jr. had won the election with a combination of disappointment and disbelief.

Larry Thompson, who had voted for President Trump in Prosper, Texas, initially believed that Mr. Trump would win re-election in a landslide. Even after media outlets had called the race for Mr. Biden, Mr. Thompson, 75, still thought the president would ultimately prevail.

“I don’t believe what The A.P. has called here for Biden, especially because of all the discrepancies that are out there,” Mr. Thompson said. “I’m not agreeing with that assessment.”

Mr. Thompson pointed to “computer glitches and all these new ballots” as potential sources of fraudulent votes. “I want my guy to win,” he said. “But if he loses fair and squarely, I’m in. But that doesn’t seem to be the case on the other side.”

In Washington, a few dozen Trump supporters gathered outside the Capitol shortly after 1 p.m. in a peaceful protest against the election results. One person waved a sign reading “four more years,” while another waved a sign stating “Stop the Steal.”