Senior Blinken aide is taking a top job with Austin after Senate confirmation holdup WHIO TV 7 and WHIO Radio [Video]

WASHINGTON — (AP) — Secretary of State Antony Blinken announced Monday that one of his most senior aides is leaving for a top job with Defense Secretary Lloyd Austin and will be replaced by a brother of President Joe Biden’s national security adviser.

State Department counselor Derek Chollet, a veteran of national security positions in Democratic presidential administrations, will become Austin’s chief of staff. Chollet will be replaced in his State Department role by Tom Sullivan, brother of Biden’s national security adviser, Jake Sullivan. Tom Sullivan had been Blinken’s deputy chief of staff for policy.

Chollet had been nominated to be undersecretary of defense for policy, but his Senate confirmation was stalled, and administration officials had become increasingly frustrated by the repeated delays.

The musical chairs in national security hierarchy comes amid increasing concern over developments in the Middle East, Ukraine and China.

“I am delighted that Derek Chollet will …