Democratic Sen. Robert Menendez will resign next month after corruption conviction

Democratic Sen. Robert Menendez will resign next month after he was found guilty on all 16 counts in a federal bribery and corruption trial, three sources familiar with the matter told NBC News.

Menendez will leave office on Aug. 20, the sources said, with two saying he has informed some of his staff. One of the sources close to Menendez said the senator has written his letter of resignation, is submitting it and will resign. His date of departure was first reported by the New Jersey Globe.

As NBC News first reported last week, Menendez had begun calling allies telling them he would step down from the Senate after he was convicted by a jury of accepting bribes, including gold bars and cash, for official actions to benefit Qatar and Egypt. He is set to be sentenced on Oct. 29, though he has vowed to appeal.