“I know it is unusual, I admit, for somebody running for president, especially the day before an election, but I’ve been saying this for months,” Mrs. Clinton said in Grand Rapids. “We need more of two things right now: We need more love and kindness in America.”

The crowd liked it, but not as much as they did when she asked them to shout out the interest rate on their college loans. “12.7 percent? 14.1 percent? I gotta tell you, that is outrageous,” she said, appearing thrilled that a policy call-and-response had received such a roar of applause from Michiganders.

Mrs. Clinton ended the rally, as she usually had, by declaring, “Love trumps hate!”

Aides and friends who talked to Mrs. Clinton on Monday described her as happy and “at peace.” There were still nerves about how it would all turn out on Tuesday, they said, but she had done all she could do.

As Mrs. Clinton boarded her plane in Grand Rapids for an evening rally in Philadelphia with her husband, her daughter and the Obamas, she stopped at the top of the steps and turned to wave at no one in particular, something that presidents often do but Mrs. Clinton does not.

In Philadelphia, Bruce Springsteen sang her praises, presenting his song “Long Walk Home” as “a prayer for postelection.” In his raspy New Jersey way, he declared that on Tuesday, Mrs. Clinton’s opponent’s “ideas and that campaign are going down.”

When Mrs. Clinton finally came out to address the biggest crowd of her campaign — 33,000 people packed in front of Independence Hall under the bright glow of a half moon — Mr. Obama gave his former rival a long hug and helped position her stool just right. “I want this to be perfect for you,” he said.