Supporters of President Obama are more than twice as likely as backers of Mitt Romney to want strict environmental regulations on natural-gas fracking, according to a Bloomberg National Poll released Thursday.

The Sept. 21-24 poll found only 32 percent of likely Romney voters calling for more hydraulic fracturing, or fracking, regulations, compared to 76 percent of Obama proponents.

As a whole, the poll found 56 percent of Americans want more rules on the practice, a drop from 65 percent in a March survey.

Also, 29 percent of the 1,007 respondents wanted fewer fracking regulations, up from 18 percent in the previous poll.