(CNN) - A worn-sounding President Obama urged his most ardent supporters Monday to maintain their drive enrolling Americans in his health law's exchanges, saying their support was even more essential now that it's clear a chunk of potential enrollees won't be able to use the troubled HealthCare.gov website.
The botched rollout of the site has "fed" misinformation about the Affordable Care Act, Obama added during an audio address to supporters of Organizing for Action, the political group that was formed from his 2012 re-election campaign.
Enrollment in the Obamacare exchanges has been "hampered by HealthCare.gov," Obama told his backers. "Eventually, it will be the easiest place to shop for health care. But because of the problems with the website, it has made it tougher for folks who were very interested in enrolling."
The President said that supporters of OFA, which has launched campaigns to education people about Obamacare, could help bridge the gap between the wonky website and enrollment in the health exchanges, encouraging them to use the upcoming holiday season to tell family and neighbors about the benefits of his signature law.
"We've got to get out there and get it done," he said, saying Christmas parties and gatherings at churches and synagogues were opportunities to educate people about the law.
"It's long race, and we're not near the tape yet. We've got to keep on running," he said.
On Monday, White House Press Secretary Jay Carney explained the administration expects 20% of potential Obamacare enrollees not to be able to use HealthCare.gov to sign up. Of that group, some have health or financial situations that are too complex for the website to handle, or are uncomfortable submitting the necessary information over the internet. Some will also be barred from using the website due to its technical problems.
"We've always understood that we are going to have to enroll people by mail, we're going to have to enroll people over the phone, we're going to have to enroll people in person. It turns out that purchasing insurance for a lot of folks is complicated. It's not something they've necessarily done before," Obama said on Monday.
The president ended his 14-minute remarks by hammering Republicans for blocking his judicial nominees, particularly for the U.S. Court of Appeals for the District of Columbia Circuit.
"This kind of obstructionism is unprecedented," Obama said, and called for Republicans to hold up-or-down votes on his picks for the bench.