Despite a series of problems with the Web site for President Obama's new health care exchanges, support for the law is up slightly.

A new Gallup poll shows support has increased four points since August, thanks to a rise in support from Democrats.

Overall, 45 percent of Americans back the health-care law -- up from 41 percent in August -- while 50 percent oppose it. Opposition to the law has consistently been higher than support for it.

That increase in support is almost exclusively because of Democrats. While 71 percent of Democrats backed the law in August, 83 percent support it now. Nearly all of the 12 percent of Democrats who had expressed no opinion of the law in August now support it.

The poll was conducted Oct. 18-20, after the government shutdown ended last week and as the media was beginning to turn more of its attention to glitches on the Web site.