After losing in Congress, President Donald Trump is counting on the courts to kill off “Obamacare.” But some cases are going against him, and time is not on his side as he tries to score a big win for his re-election campaign.

Two federal judges in Washington, D.C., this past week blocked parts of Trump’s health care agenda: work requirements for some low-income people on Medicaid, and new small business health plans that don’t have to provide full benefits required by the Affordable Care Act.

But in the biggest case, a federal judge in Texas ruled last December that the ACA is unconstitutional and should be struck down in its entirety. That ruling is now on appeal. At the urging of the White House, the Justice Department said this past week it will support the Texas judge’s position and argue that all of “Obamacare” must go.

A problem for Trump is that the litigation could take months to resolve — or longer — and there’s no guarantee he’ll get the outcomes he wants before the 2020 election.

“Was this a good week for the Trump administration? No,” said economist Gail Wilensky, who headed up Medicare under former Republican President George H.W. Bush. “But this is the beginning of a series of judicial challenges.”

It’s early innings in the court cases, and “the clock is going to run out,” said Timothy Jost, a retired law professor who has followed the Obama health law since its inception.

“By the time these cases get through the courts there simply isn’t going to be time for the administration to straighten out any messes that get created, much less get a comprehensive plan through Congress,” added Jost, who supports the ACA.

In the Texas case, Trump could lose by winning.

If former President Barack Obama’s health law is struck down entirely, Congress would face an impossible task: pass a comprehensive health overhaul to replace it that both Speaker Nancy Pelosi and Trump can agree to. The failed attempt to repeal “Obamacare” in 2017 proved to be toxic for congressional Republicans in last year’s midterm elections and they are in no mood to repeat it.

“The ACA now is nine years old and it would be incredibly disruptive to uproot the whole thing,” said Thomas Barker, an attorney with the law firm Foley Hoag, who served as a top lawyer at the federal Health and Human Services department under former Republican President George W. Bush. “It seems to me that you can resolve this issue more narrowly than by striking down the ACA.”