Three of the groups challenging the reform agenda of President-elect Donald Trump and his education secretary nominee Betsy DeVos received more than $2.6 million from teachers unions and their allies, according to federal labor filings.

BY THE NUMBERS: TEACHER UNION CONTRIBUTIONS

DeVos, a pioneer in the school choice and charter school movements over the last two decades, has received vocal opposition from Democrats and some of the country’s most powerful unions. The National Education Association, American Federation of Teachers, and AFL-CIO, which serves as an umbrella group for dozens of unions including the AFT, have all called on the Senate to reject the nomination.

LIBERAL GROUPS ACCUSED OF HYPOCRISY OVER CALL FOR RECUSALS IN DEVOS CONFIRMATION

They have also pumped millions of dollars into think tanks and activist groups that have supplied Democrats with intellectual ammunition to oppose her.

DeVos, the head of the American Federation for Children, has come under scrutiny from a number of liberal groups and media outlets, along with unions. The Economic Policy Institute (EPI) and Center for American Progress (CAP) have each released reports critical of charter schools since President-elect Donald Trump announced the nomination in November.