Two new polls show President Obama hitting a new low for his presidency.

A Quinnipiac University poll shows Obama's approval rating dropping to an all-time low of 38 percent -- down from 39 percent a month ago -- and his disapproval rating rising to an all-time high of 57 percent -- up from 54 percent last month.

A Marist College/McClatchy poll, meanwhile, shows a new high for the percentage of Americans disapproving of Obama's job performance. The 53 percent who disapprove is higher than the 52 percent who disapproved in September 2011.

Obama's approval rating in the Marist poll (43 percent) remains above his lowest-ever (39 percent) recorded in the September 2011 poll.

The Marist poll also shows, for the first time, a majority of Americans (52 percent) view Obama unfavorably. Forty-six percent say they view Obama favorably -- a measure that gauges more personal characteristics than job performance.

Obama's numbers slid to new lows in most of the recent polling of his presidency -- owing, apparently, to the struggles of his signature piece of legislation, the Affordable Care Act.

Update 5:43 p.m.: In contrast to these polls, a just-released Pew Research Center poll shows Obama recovering somewhat -- to a 45 percent approval rating and 49 percent disapproval.