“The president will speak about the American tradition of being a welcoming society and the incredible contributions of immigrants and refugees to our nation,” a White House official said, speaking on the condition of anonymity because he was not authorized to talk publicly about the ceremony before it occurred.

The event, held on the 224th anniversary of the ratification of the Bill of Rights, will feature 31 candidates for citizenship, from 25 countries, the official said. It will be held at the National Archives, and Richard W. Roberts, chief judge of United States District Court for the District of Columbia, will preside…

Ms. Khera said that since the Paris attacks, her office had documented an unprecedented series of hate crimes against Muslims and Muslim houses of worship — nearly 50 episodes, or an average of two a day. She said she had asked the president’s advisers to urge the federal government to prosecute “the most egregious” attacks as hate crimes.

“We believe the level of hate violence has reached a crisis point, and that’s why it’s crucial that the federal government needs to send a message to the public, in the strongest terms, that these hate crimes will be prosecuted to the fullest extent of the law,” Ms. Khera said.