Investigation launched after intruder enters home of national security adviser.

The US Secret Service is investigating an intrusion at the home of Jake Sullivan, President Joe Biden’s national security adviser. A man entered Sullivan’s home in Washington’s West End neighborhood around 3 a.m. one morning last month. Sullivan confronted the intruder, who appeared to be intoxicated, and told him to leave. Secret Service agents were posted outside Sullivan’s house, but the intruder was able to enter undetected and fled before agents were made aware of his presence. The news of the invasion comes amid an increase of threats and acts of political violence.