The subsidies under ACA 1402 was not funded by the law, hence subsidies under this clause are illegal, as noted in the 5/12/2016 case of US House of Rep. vs. S Burwell as HHS secretary, in US District Court, DC.
http://www.scotusblog.com/wp-content/uploads/2016/05/HofR-challenge-to-ACA-DCt-5-12-16.pdf

Trump was following the law, by revoking these payments.