WASHINGTON (AP) — Murtice Sherek is not excited about Joe Biden.

The Minnesota Democrat, a 79-year-old retired nurse, preferred another candidate in the presidential primary. She also worries about Biden’s age, 77. But anxious about another four years of President Donald Trump, she says she’s willing to go to any length to ensure Biden wins this fall.

“I don’t really give a damn what I have to do. If I have to carry signs on the streets, if I have to carry my old friends to the polls, I’ll do it,” Sherek said. “This just can’t be. Trump is a sick man.”

Roughly three months before Election Day, a new poll from The Associated Press-NORC Center for Public Affairs Research finds that Biden’s supporters are less enthusiastic than Trump’s — both about the campaign itself and about their candidate — although the Democrat’s coalition may be equally motivated by anxiety.

Still, the poll reveals an American public at odds with Trump on wearing masks, on balancing restrictions to stop the virus with efforts to help the economy and on fully reopening schools. And voters give Biden higher marks on many positive traits that apply to leadership in the age of the coronavirus, including honesty, capability and caring for Americans.

Sherek’s assessment of the candidates highlights the nuanced motivations underlying the so-called enthusiasm gap, which has raised concerns among Biden’s allies who worry the deficit could undermine his candidacy once voting begins.

While interest in the presidential campaign is high across the board, just 31% of Biden supporters say they’re excited, compared with 42% of Trump supporters. Biden’s coalition is fueled by more negative emotions: 72% of Biden supporters, but 52% of Trump supporters, say they feel anxious about the 2020 campaign. The same disparity exists for frustration with the election, 65% for Biden supporters and 45% for Trump’s.

Anya Kumar, an 18-year-old recent high school graduate from Columbia, Missouri, vowed to vote for Biden this fall but conceded many of her young friends who oppose Trump don’t feel much passion for the former vice president. Many aren’t even registered, she said.

“For the most part, people I know really just don’t want Trump,” Kumar said, acknowledging that she is motivated more by anxiety about Trump’s reelection than genuine excitement about his Democratic rival. “If Biden doesn’t win, that would suck.”

Biden’s team largely dismisses the idea of an enthusiasm gap. It says that with Trump’s level of support shrinking, a greater share of energized supporters is left behind in the diminished pool. Indeed, Trump’s job approval in the new poll sits at 38%, within the narrow range that has endured throughout his presidency but down from relative highs earlier this year.

Just 32% of voters approve of the way Trump is handling the pandemic, a low point that follows a steady decline from the outset of the crisis. While Trump’s supporters almost unanimously approve of his performance overall, 2 in 10 disapprove of his response to the pandemic.

Stacey Rogus, 43, a Republican from Glendale, Arizona, who works in the medical industry, admitted some concerns about Trump. She says the president is narcissistic, doesn’t act as “presidential” as she’d like and doesn’t think before he speaks. But Rogus is determined to vote for him a second time because of his economic policies and support for the U.S.-Mexico border wall.