WASHINGTON — Hillary Clinton is seizing opportunities presented by a volatile presidential race to expand her base of support heading into the fall, seeking to position the Democratic Party for a sweeping victory in November.

As Republican Donald Trump struggles through a second week of self-inflicted stumbles, the Democratic nominee’s campaign has started to push into GOP territory by courting some of the party’s core supporters and expanding her campaign’s operations into traditionally red states.

“The map favors us and, in a way, the dynamics right now favor us,” said Joel Benenson, Clinton’s senior strategist. “The more places you can make them play defense, the better off we are.”

Throughout his presidential bid, the Republican nominee has used controversy to draw attention to his campaign. It is a strategy that initially worried some Clinton aides, who feared that Trump would drown out their candidate’s message.

But with three months to Election Day, Clinton aides say they see more advantages than liabilities as Trump continues to say the politically unimaginable. Critics slammed Trump last week for appearing to suggest that gun-rights supporters could shoot Clinton to prevent her from appointing federal judges as president, and he drew criticism for standing by a false claim that President Barack Obama founded the Islamic State.

On Thursday, Trump said he would respond to admitted problems in his campaign by doing “the same thing I’m doing right now.” In an interview with CNBC, he said, “At the end, it’s either going to work or I’m going to … have a very, very nice, long vacation.”

Democratic strategists have long argued that the party could win the White House with Obama’s political coalition, the group of minority, young and female voters who twice boosted him to victory. They see the additional support Clinton is finding among independent and Republican voters as frosting on their electoral cake, potentially allowing Democrats to win back control of the Senate and enter the White House with the political momentum that comes from a sweeping victory.

“You care very deeply about the 270th electoral vote, but there are also important reasons to care about winning big,” said Geoff Garin, a pollster for Clinton’s 2008 presidential campaign who now advises the pro-Clinton super-PAC Priorities USA Action. “This is not just about rolling up the score.”

Clinton aides say she is taking nothing for granted, noting that the United States remains a deeply divided country. They say they remain focused on the most efficient path to capturing the 270 electoral votes needed to win the White House.

Yet Clinton is undoubtedly beginning to cast her gaze beyond the Democratic base.

“I am humbled and moved by the Republicans who are willing to stand up and say that Donald Trump doesn’t represent their values,” she said at a rally in Iowa. “We may not agree on everything, but this is not a normal election and I will work hard over the next three months to earn the support of anyone willing to put our country first.”

On Wednesday, after two weeks of high-profile Republican defections, her campaign launched an official effort to target GOP voters. It also took baby steps into some traditionally red states, with Clinton campaign officials telling party officials in Arizona and Georgia that they plan to make a six-figure investment in field operations in the two states.

The next day, Clinton published a column in Salt Lake City’s Deseret News titled “What I have in common with Utah leaders — religious freedom and the Constitution.” While the state has not backed a Democrat for president since Lyndon B. Johnson in 1964, Trump acknowledged Thursday that he is “having a tremendous problem in Utah.”

Jeremy Bird, who ran field operations for Obama’s 2012 campaign and is now consulting for Clinton’s operation, said Trump has no one to blame but himself. The unorthodox candidate has not aired a single television ad since the end of the primaries and is building a bare-bones effort to get out the vote.

“His inability to put anything real on the ground in battleground states is campaign malpractice,” Bird said. “There are just so many paths to 270 and so many ways to put their presidential campaign and the Republican Party in a defensive posture, even in states that are not considered battlegrounds.”

Some recent polls suggest that Clinton could also benefit from Republican-leaning voters deciding to stay home rather than turn out to support Trump. Surveys in Wisconsin, Pennsylvania and Ohio found that 90 percent of Democrats say they intend to support Clinton, while closer to 80 percent of Republicans intend to support Trump.

Republicans caution that the race remains far from settled, especially since voters do not particularly like either candidate. A small group of middle-class mothers interviewed by pollsters Tuesday in Columbus, Ohio, and Phoenix used words such as “painful,” “nauseated” and “screwed” to describe their choice.

“They don’t trust Hillary Clinton,” said Republican pollster Neil Newhouse, part of the bipartisan team that conducted the focus groups. “At the same time, they can’t turn to Donald Trump because he scares them.”

Of the 20 women in the group, five said they were leaning toward Trump, seven toward Clinton and eight undecided or backing a third party.

Only one believed Trump would win.

Associated Press polling editor Emily Swanson contributed to this article.