By DARLENE SUPERVILLE, MARYCLAIRE DALE and CHRIS MEGERIAN PHILADELPHIA (AP) — Kamala Harris said Sunday that “no one can sit on the sidelines” in this year’s presidential election, capping a day of campaigning across the largest city in the crucial battleground state of Pennsylvania. “We are focused on the future and we are focused on the needs of the American people,” Harris said, “as opposed to Donald Trump, who spends full time looking in the mirror focused on himself.” Speaking at a city recreation center, the Democratic vice president singled out young voters, praising them for being “rightly impatient for change,” and told the audience that “there is too much at stake” in the campaign. “We must not wake up the day after the election and have any regret about what we could have done in these next nine days,” Harris said. Mark Ruffalo and Don Cheadle, two actors who starred in Marvel’s “Avengers” movies, were at the rally.