The US Senate has confirmed President Donald Trump's controversial nominee for education secretary, Betsy DeVos, by the slenderest possible margin.
US Vice-President Mike Pence cast the tie-breaking vote to secure her cabinet role, splitting the chamber 50-50.
It was the first time ever that a vice-president has interceded in such a way for a cabinet secretary.
Mrs DeVos, a billionaire who has no experience with public schools, faced a rocky confirmation hearing last month.
Moments after voting ended, she tweeted: 'I appreciate the Senate's diligence & am honored to serve as @usedgov Secretary.
'Let's improve options & outcomes for all US students.'
Senate Democrats staged a 24-hour debate into Tuesday to hold up her confirmation.
Betsy DeVos's education secretary nomination looked a bit shaky for a while, but no Republican senator was willing to be the third 'no' vote that would have sunk her.
Secretary of State Rex Tillerson's ties to Russia made some conservatives uneasy, and prompted sharp questioning from Senator Marco Rubio of Florida, but the former oil magnate's party closed ranks behind him.
The only real question mark left is labour secretary nominee Andrew Puzder, whose confirmation hearings have been postponed four times amid reports that he has not fully disentangled himself from his sprawling fast-food business empire.
If he withdraws, however, it will be quietly, before a confrontation with Democrats heats up.
Democrats always faced an uphill battle in bringing down any of Mr Trump's cabinet nominees, given the mathematical reality of being in the Senate minority.
Republicans were loath to deal an early, embarrassing setback to the new president, possibly earning his long-term enmity.
The fight over Mrs DeVos and other nominees has engaged the Democratic base, however.