WASHINGTON—President Joe Biden and First Lady Jill Biden will be in Europe on Halloween and won’t be at the White House to help hand out candy and other treats. Instead, the Pennsylvania Avenue side of the White House will be lit up in orange light to celebrate the Halloween, said the first lady’s spokesperson, Michael LaRosa. It’s the Bidens’ first Halloween at the White House. “The president and first lady will be traveling internationally during the last days of October, and will not be hosting a specific event at the White House,” LaRosa said in a statement. The Bidens will be in Rome, where the president will attend the annual Group of 20 (G-20) summit of the world’s leading rich and developing nations from Oct. 30–31. LaRosa did not mention the coronavirus pandemic in his statement, but he said Biden and his wife were encouraging families and children to celebrate …