Doug Emhoff, the husband of Vice President Kamala Harris and the first Jewish spouse of a president or vice president, led a White House roundtable of government officials, rabbis, and leaders of advocacy groups on Dec. 7 to discuss the rise of antisemitism here and abroad. He was joined at the event by Susan Rice, President Biden’s domestic policy adviser; Deborah Lipstadt, a special envoy to monitor and combat antisemitism; Shelley Greenspan, the White House Jewish liaison; Keisha Lance Bottoms, the director of public engagement; Josh Geltzer, the deputy homeland security adviser; and members of the Anti-Defamation League. “As long as I have this microphone, I’m going to speak out against hate, bigotry, lies,” Mr. Emhoff said. “I’m going to speak out against those who praise fascist murderers and idolize extremists.”