A top national security adviser has become the second prominent official to resign from the Trump administration within days, as Deputy National Security Advisor Andy Baker announced his departure from the White House.

Baker, a longtime close ally of Vice President JD Vance and a key architect of the administration’s foreign policy decisions, is stepping down after nearly two years in the role. He played central roles in negotiating with Iran and previously served as national security adviser to Vance before ascending to deputy national security advisor.

The resignation follows Press Secretary Karoline Leavitt’s exit weeks ago and marks Baker’s second departure from White House staff—a transition he described as extending beyond his planned timeline to ensure a smooth handover. Sources indicate Baker will join the private sector, collaborating with former Trump National Security Advisor Robert O’Brien while prioritizing family time.

Baker’s exit underscores growing instability in the administration’s national security apparatus during a period of significant personnel shifts.