WHITE PLAINS, New York — Hillary Clinton is advancing into states the Democrats haven’t won in decades, confidently expanding her offensive against Donald Trump and aiming to help her party win back control of Congress.

There’s a new $2 million push in Arizona, aides said Monday, including a campaign stop in Phoenix by first lady Michelle Obama, one of Clinton’s most effective surrogates. An additional $1 million is going into efforts in Missouri and Indiana, both states with competitive Senate races, a small amount of TV time is being bought in Texas and media appearances are scheduled in Utah.

At the same time Clinton is showing new signs of confidence, she faced fresh revelations about her use of a private server as secretary of state and hacked emails from a top campaign official’s personal account. FBI records released Monday show that a senior State Department official unsuccessfully sought to lower the classification level of an email found on the server, a move Trump’s campaign labeled collusion.

The new questions highlight a dual reality of the presidential race: Even as Clinton has a growing advantage, she’s been unable to put the biggest controversy of her campaign behind her.

With her lead increasing, Clinton is unlikely to need any of the normally solid-red states to win the White House.