At a rally in Pittsburgh, Mrs. Clinton decried Mr. Trump’s “negative, divisive, hateful” presidential campaign and said that she was prepared to unite the country.

“I’ve got to say, anger is not a plan, my friends,” Mrs. Clinton said, calling for renewed dialogue across party lines.

For Mr. Trump, the anger that has fueled his campaign was on full display at a rally in Sarasota, Fla., where he lashed out at Jay Z and Beyonce for using “lewd” language while performing at an event for Mrs. Clinton and chastised his opponent for being a hypocrite.

“If I ever used those words it would be the reinstitution of the electric chair,” Mr. Trump said, referring to the profanity used by the performers. “And yet with me, ‘he’s very lewd.’”

Returning to Mrs. Clinton, he added, “She’s such a phony.”

The Trump campaign ‘accepts’ the decision on Clinton’s emails.

While Mr. Trump continued to bemoan a rigged justice system, his campaign manager, Kellyanne Conway, acknowledged on Monday that it was time to move on.

“I do accept that,” Ms. Conway said on ABC’s “Good Morning America” program when asked about the F.B.I.’s decision not to charge Mrs. Clinton over her use of a private email server.

Ms. Conway continued to point to the saga over Mrs. Clinton’s emails as evidence that Mrs. Clinton is not trustworthy and she argued that the ongoing discussion over her case was still damaging.