The Maine Legislature, after reaching a bipartisan agreement to adjourn in March, remains out of session, freeing Ms. Gideon to appear at a string of virtual events and make individual appearances at local hospitals and other facilities. Ms. Collins spends most weekdays in Washington working on Senate business, leaving her few opportunities for face-to-face campaigning before Election Day.
“It’s a more challenging environment in which to reach people,” Ms. Collins conceded on Saturday as she crisscrossed the state. “Being grossly outspent makes it harder, because I can’t offset that by increasing the number of appearances that I’m doing.”
While she has split with Mr. Trump more than any other Republican senator in the 116th Congress, Ms. Collins’s carefully cultivated reputation as a moderate has been damaged during his tenure, particularly after she backed the $1.5 trillion tax-cut package in 2017 and cast a decisive vote in 2018 to confirm Brett M. Kavanaugh to the Supreme Court. When Justice Kavanaugh sided with the court’s conservative majority in an abortion decision last week, progressives renewed their attacks.
Unlike in 2016, when she very publicly declared that she would not vote for Mr. Trump, Ms. Collins refused on Saturday to say how she planned to vote come November.
“My inclination is just to stay out of the presidential and focus on my own race,” she said.
As for Mr. Biden, “I do not campaign against my colleagues in the Senate,” she added, explaining that taking on Mr. Biden, whom she knows “very well” from their days serving together there, would be akin to violating her own rule.
Yet national Democrats are not holding back against Ms. Collins. They are spending huge sums on an onslaught of television, radio and YouTube ads that frame her as beholden to corporate donors and drug companies and unwilling to counter Mr. Trump and Senator Mitch McConnell of Kentucky, the majority leader. As of June 9, outside groups have spent $11.9 million on TV and radio ads against Ms. Collins, compared to $6.7 million in her favor, according to the Collins campaign.