President Donald Trump urged lawmakers Friday to support the GOP health reform plan if they want to 'save Americans from imploding Obamacare disaster.'

Health insurance premiums are doubling, and in some cases tripling, he declared during a meeting at the White House with committee chairs, as he predicted that 2017 'would be a disaster for Obamacare.'

'That's the year it was meant to explode, because Obama won't be here. That was when it was supposed to be,' he proclaimed. 'As bad as it is now, it will get even worse.'

President Donald Trump urged congressional Republicans Friday to support his health reform plan if they want to 'save Americans from imploding Obamacare disaster'

The Republican-run House Ways and Means and Energy and Commerce Committees have already approved the White House-backed bill to repeal and replace the previous administration's health law.

Sitting at a table in the Roosevelt Room with committees' heads, Congressmen Kevin Brady and Greg Walden, Trump thanked the bill's authors for their 'devotion' to producing an Obamacare alternative and their 'leadership.'

It's 'been amazing,' he said.

The president told legislators for a second time this week that he expects the health care bill to move through Congress quickly, in spite of intense opposition from some conservatives as well as liberals, while promising the new law would fulfill Obama's unmet promises.

On the campaign trail, Trump hammered away at the Democrat's health care law and promised to get rid of it.

After meeting with President Obama in November, Trump said he wanted to keep a provision that allows young adults to stay on their parents' plans and a mandate that insurers cover Americans with pre-existing conditions.

Those measures will remain in place if the GOP's reforms are successful, potentially because Obama's lobbying.

Trump and Obama talked on the phone a handful of times after the election, appearing to turn a corner in their relationship during the transition. It's not known whether they have spoken since the inauguration.

'I’m not aware of whether or not they’ve talked,' White House Press Secretary Sean Spicer said Monday.

Spicer was responding to a question about Trump's allegation in a string of Saturday tweets that Obama wiretapped him - a shocking charge that the White House has not backed up with evidence.

The former president said through a spokesman that it did not happen. The Trump White House is punting on further comment until the end of a congressional investigation.

Friday the president tangled with his predecessor again as he claimed that his namesake law was designed to fall apart just after he exited office.

Trump also hit Obama over the head for for claiming Americans would be able to keep their doctor and their plan if they wanted. 'It turned out not to be true,' Trump said.

'This is the time we're gonna get it done. We're working together. We have some great results. We have tremendous spirit,' Trump said. 'And I think it's something that is just going to happen very shortly.'

Trump met today in the Roosevelt Room with House committee heads, including Energy and Commerce chair Greg Walden (pictured). Trump thanked Walden, one of the GOP bill's authors, for his 'devotion' to producing an Obamacare alternative

The president said Thursday that he thinks the GOP bill will ultimately clear legislative hurdles in the House and Senate.

'Despite what you hear in the press, healthcare is coming along great. We are talking to many groups and it will end in a beautiful picture,' he tweeted.

His spokesman confidently told a reporter later in the day that there's no reason to consider the conservative-preferred option to pass a repeal bill first, then work on a replacement.

'This bill will land on the president's desk. He will sign it. We will repeal Obamacare,' Spicer stated.

At a meeting Wednesday with the House Republican deputy whip team, Trump claimed passage on Capitol Hill would 'go very quickly.'

He added after a beat: 'I hope it's going to go very quickly.'

'This will be a plan where you can choose your doctor,' Trump vowed. 'This will be a plan where you can choose your plan.'

Influential conservative organizations have come out against the bill that they say doesn't do enough to create competition and drive down costs. Democrats are leading an all-out assault on the GOP effort to toss out Obama's signature legislation.

'They are diminishing access,' House Minority Leader Nancy Pelosi said at a Friday breakfast hosted by the Christian Science Monitor.

LISTEN UP: Representative Virginia Foxx, Republican of North Carolina and House Education and Workforce Committee Chairwoman, talks to Trump about healthcare reform in the Roosevelt Room this morning

Pelosi, the speaker of the House when Obama's health bill went through Congress, said wouldn't speculate on how many Republicans would vote for the the current repeal bill.

Speaking on behalf of her own caucus she said, 'I don't see any Democratic votes for what they're doing. None.'

Sen. Lindsey Graham, a Republican from South Carolina who is often at odds with Trump, said Tuesday that he lunched with the president and believes that he is in 'deal-making mode.'

Arizona Rep. Trent Franks, a member of the House's ultra conservative Freedom Caucus, told CNN that he had been invited to go bowling at the White House to hear the Republican health legislation pitch.

Responding to a question about Graham, Pelosi brought up the Freedom Caucus outing and asked if 'dealmaking' was code for 'bowling at the White House in return for support for legislation?'

'I find the charm offensive offensive. I really do,' she said. 'I think he's making fools of his own people quite frankly. "You don't agree philosophically and what the legislation is? Let's go bowling at the White House." OK? Come on.'

Democrats have taken steps to slow the speed of the health bill's final passage, asking for 30 days in the House Energy and Commerce Committee before mark up and amendments in the Ways and Means Committee to that caused a lag and forced Republicans on the record on missing measures.

They'll have an opportunity to stall the bill again when the House Budget Committee looks at it next week.

Pelosi lightheartedly denied that Democrats were engaging in 'delay' tactics as she talked to reporters after the Washington, D.C. breakfast Friday.

'I wouldn't call them necessarily delay tactics,' she remarked. 'They are tactics to make sure the American people know what's in the bill. I would say enlightening tactics.'