With about a day left to negotiate a deal to keep the federal government open, Sen. Jeff Flake (R-AZ) on Thursday night signaled that he will not back Republicans’ current plan to temporarily fund the government.

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Flake joins a couple of other Republicans and the Democratic caucus in the Senate in opposing the bill passed by the House Thursday night, increasing the threat that the government will shut down on Friday night. Flake, an outspoken Trump critic who is not seeking re-election in 2018, did not pledge outright that he would oppose the bill, but told reporters he was “not inclined” to back the deal. He said that he would prefer passing a spending bill to fund the government for just a few days, a proposal pitched by the Democrats, in order to give Congress more time to finalize a deal to restore the protections in the Deferred Action for Childhood Arrivals program.

In an interview with the Daily Beast Thursday night, Flake complained that leaders in Congress were giving President Donald Trump too much power in steering negotiations on DACA. He argued that since Trump seems to constantly change his mind on what kind of deal he would back, Congress just needs to negotiate on its own and see if Trump will sign the bill