U.S. President Barack Obama's approval rating has fallen to the lowest level since he took office, 42 percent, according to results of the latest Washington Post-ABC News poll.

The slump in the president's popularity comes amid growing criticism of the Affordable Care Act's rollout.

In just one month, Obama's approval rating has fallen 6 percent, while his disapproval rating has jumped to 55 percent, the worst of his presidency.

Forty-four percent of respondents said they were very critical of the president's work, which is also the worst rating since Obama took office in 2009.

A whopping 70 percent said the country is on the wrong track.

The operational problems of the Healthcare.gov Web site, a key part of the ACA, has led 57 percent of Americans to oppose what has become known as Obamacare, the president's signature domestic initiative.

Added to the technical failures of the Web site are the president's unkept promise that people would be able to keep their current health insurance.

Health insurers have notified thousands of clients that their insurance has been canceled because their policies to not comply with the minimum requirements of the law, which has forced the White House to delay for another year the application of that regulation for people who want to keep their current plan.

The poll, with a margin of error of plus or minus 3.5 points, was taken between Nov. 14-17 in English and Spanish, with a sample of more than 1,000 people. EFE