Ryan said Trump took the right approach to phasing out a program that helped young immigrants brought to the country as children and now here illegally.
Trump has said he wants Congress to "legalize" the program, and he met with Democratic congressional leaders on Wednesday night to discuss a legislative way forward, but it's still far from likely that such a bill will make its way to his desk given most Republican legislators' stance on what they call "amnesty" for undocumented people.
Asked twice during an interview with the Associated Press if he will insist that tax reform be revenue neutral, Ryan didn't give a yes-or-no answer but instead deferred to the tax-writing committees that are working on the details and argued that creating economic growth with the tax plan is "more important than anything else".
President Donald Trump ended DACA, or Deferred Action for Childhood Arrivals, on September 5, and delayed the expiration date of the first recipients' work permits for six months. He said the White House is "learning what works and I think they are improving".
That would be the so-called U.S. -Mexico border wall Trump wants to build.
He says deporting those covered by the program is "not in our nation's interest".
He would not say if improvements are due to changes such as John Kelly's recent appointment as chief of staff or the departure of divisive former chief strategist Steve Bannon.
The previous chief of staff, Reince Priebus (ryns PREE'-bus), was a Ryan friend.
The Obama-era program extended temporary work permits and deportation protection to almost 800,000 younger immigrants brought to this country illegally as minors.
Rewriting the tax code, including lowering personal and corporate income tax rates, is a top goal for President Donald Trump and the GOP.