John Kelly is expected to resign as White House chief of staff in the coming days, two sources familiar with the situation unfolding in the West Wing tell CNN.

Seventeen months in, Kelly and President Donald Trump have reached a stalemate in their relationship and it is no longer seen as tenable by either party. Though Trump asked Kelly over the summer to stay on as chief of staff for two more years, the two have stopped speaking in recent days.

Kelly has been on the verge of resigning or being fired before, only to bounce back every time. But aides feel the relationship can't be salvaged this time.