The 30 hours of post-cloture debate officially expires on her nomination just after midnight.
Gabbard was an unconventional pick to oversee and coordinate the country's 18 different intelligence agencies, given her past comments sympathetic to Russia, a meeting she held with now-deposed Syrian President Bashar Assad and her previous support for government leaker Edward Snowden.
Gabbard, a former Democratic congresswoman from Hawaii turned Republican ally, landed Senate confirmation despite fierce debate over her foreign policy views, particularly her stance on Russia.
The Senate confirmed Tulsi Gabbard as Director of National Intelligence with a vote of 52-48 on Wednesday.