After a day dedicated to diplomacy at the United Nations, Obama took part in a one-hour conversation with his White House predecessor that focused on the benefits of his signature legislation.

After an introduction by Hillary Clinton, the two statesmen pitched why it was in the interest of the millions of Americans who currently don't have health insurance to sign up for a plan as of October 1.

In order for the system to work, young people, even if they opted for the cheapest plan, need to be a part of it, Clinton said. "We've got to have them in the pools because otherwise all these projected low costs cannot be held if older people with pre-existing conditions are disproportionately represented in any given state. You've got to have everybody lined up," he added.

Obama said that they wanted to make sure everyone, no matter what age, "understands why health insurance is important, understands why they should sign up, understands the choices that are going to be available to them."

"Normally this would be pretty straightforward," Obama said. In reference to congressional wrangling over the law, he added: "A lot of people don't have health insurance, a lot of people realize they should get health insurance, but, let's face it, it's been a little political.”

Those who opposed the idea of universal health care in the first place, he said, "They have been trying to scare and discourage people from getting a good deal."

With the fiscal year drawing to a close at the end of a month, far-right Republicans in Congress have threatened not to approve a budget to keep the government open for business over the law.

The Republican-led House of Representatives passed a bill last week that would prevent a government shutdown at the price of defunding the sweeping 2010 health care overhaul that was upheld by the Supreme Court two years later.

Should they fail, several government agencies will close on October 1, placing hundreds of thousands of non-essential staff on unpaid leave. Some lawmakers also want to link the law -- that has become known as "Obamacare" after being nicknamed as such by critics -- to the raising of the debt ceiling so the country can pay its bills.

(Agencies)

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