While the Obama administration is boasting higher-than-expected enrollment for the new healthcare law, a majority of Americans continue to disapprove of the healthcare overhaul, a Gallup poll found Thursday.

A steady 43 percent of Americans approve of the Affordable Care Act, or Obamacare, while a majority continue to disapprove, Gallup found in a poll released Thursday.

The law's botched rollout sparked controversy nationwide after myriad glitches in the law's centerpiece website, healthcare.gov, made it difficult for many visitors to enroll.

Moreover, the law spurred outrage by many of the estimated 4 million Americans who were dropped by their insurance providers, as their plans failed to meet Obamacare's requirements.

Fewer than four in 10 adults say the law will ultimately improve the country's healthcare situation, plagued by high costs for many Americans. In contrast, 44 percent say it will make things worse, and another 16 percent say it won't make much difference, Gallup says.

Race and ethnicity also play some role in approval of Obamacare. White Americans are by far the least supportive of the law, with only 35 percent approving. In sharp contrast, 76 percent of black Americans approve of the law, while less than a fifth disapprove.

Meanwhile, 57 percent of Hispanics -- a group targeted by the law -- approve, and one-third disapproves, Gallup found.

Indeed, the Obama administration made a concerted effort to try to enrol Hispanics, the least likely of the three major ethnic groups to report having health insurance, with President Barack Obama appearing on two Spanish-language television networks earlier this year to discuss the issue.

Black Americans are also most likely to see the law as making the healthcare situation in the U.S. better, with 64 percent saying so, Gallup found.

Obamacare has over the last eight months grabbed headlines nationwide after the botched healthcare.gov rollout that became a major liability for the administration and its signature legislative achievement, and matters only worsened once insurance companies began dropping Americans due to the law.

But the issues with the website were eventually resolved, and the number of people enrolled exceeded initial expectations, giving the law's supporters something of a happy ending, Gallup noted.

The numbers suggest that most Americans have made up their minds on this issue and see no reason to revisit their opinion. This is likely a consequence of the polarizing effect of the law -- Republicans are solidly opposed, while the bulk of Democrats support it, Gallup said.

It remains uncertain what role this still unpopular law will play in this year's midterm Congressional elections, as the economy and unemployment top the list of Americans' concerns.

Still, many Republican candidates competing against Democratic incumbent senators in states such as North Carolina, Arkansas, and Louisiana are highlighting their opposition to the law. Some Democrats may try to defend it, while others may try to change the topic of discussion, Gallup said.