Stephanie Grisham, the former White House communications director and press secretary and current chief of staff for first lady Melania Trump, submitted her resignation Wednesday afternoon, effective immediately, in the wake of the violent protests, a White House official says.

Grisham was one of the longest-serving Trump administration officials, having begun her tenure working for then-candidate Donald Trump in 2015 as a press wrangler on the campaign trail. Grisham entered the White House as deputy press secretary under Sean Spicer, but in March 2017, Melania Trump hired her for her East Wing staff. As East Wing communications director, Grisham quickly became the first lady’s most prominent staffer, acting as defender, enforcer and, often, protector.