For Republicans willing with disassemble Obamacare, President Donald Trump’s prime-time location on congress tuesday night is molding dependent upon likewise a high-stakes proposition.

More than five weeks after Inauguration Day, Trump is set to deliver a speech that lays out his vision for the country and highlights his most urgent policy priorities. Trump has said that repealing and replacing the Affordable Care Act is at the top of his agenda – but so far, his public remarks about overhauling the health care system have proved to be a mixed bag for fellow Republicans.

Looking into monday, on the eve for as much joint location to Congress, Trump might have been characteristically gruff. “Now, I have to tell you, it’s an unbelievably complex subject,” Trump said about health care reform during a meeting with governors. “Nobody knew health care could be so complicated.”

The comments acknowledged the myriad of problems GOP leaders have confronted in their efforts to repeal and replace Obamacare.

“It’s complicated. In fact, it’s almost impossible, but we’ll figure it out,” said GOP Senate Finance Committee Chairman Orrin Hatch

House Speaker Paul Ryan and Senate Majority Leader Mitch McConnell want to see Trump offer more specifics on health care – and publicly back the House GOP plan, sources tell CNN.

Throughout a meeting during those White House looking into monday, Ryan might have been provided for those feeling that the organization will be grasping a significant part of the house GOP want looking into Obamacare furthermore that the President will make that clear for as much discourse.

This should help reassure House Republican leaders and their aides, some of whom had been growing increasingly concerned by the President’s unwillingness to embrace – or, many believe, fully understand – the congressional approach to health care.

If Trump doesn’t better articulate his support for their plan, “it is in trouble,” a GOP Hill aide said earlier in the week.

“This is a critical moment for him to get behind this,” another senior Republican congressional aide said.

Top Republicans have been slowed down by numerous intra-party disagreements, including over how much of the health care law to repeal and how fast.

Rep. Mark Meadows, the chairman of the conservative House Freedom Caucus Chairman, told CNN monday that he would not support a draft of the House GOP leadership’s repeal bill that was leaked last week. Rep. Mark Walker, chairman of the Republican Study Committee, announced his opposition hours later. A widespread defection within the conservative wing of the party could tank the party’s efforts to repeal Obamacare altogether.

Republicans are hoping that Trump will seize Tuesday night’s closely watched speech to send a unifying message on Obamacare.

“We talk about (health care) all day every day so we’ve got lots and lots of ideas. They need to be brought together in a single course and agreed on. That’s where we need to be,” Idaho Republican Sen. Jim Risch told CNN. “He’s the president. He needs to be part of this also.”

The leaked House bill revealed Republicans are eying major cuts to Obamacare’s Medicaid expansion – a tension point for some Republican governors who have benefitted from the boost in federal dollars. The plan also included a defunding of Planned Parenthood, something that moderate Republicans like Alaska Sen. Lisa Murkowski have already drawn a line against supporting.