The Gallup polling organization, one of the oldest in the land, reports three-day rolling average approval (43%) and disapproval (50%) figures for President Obama. These numbers come after Team Obama has run a series of very negative TV ads which have received a lot of critical publicity and reaction.
That 43% will vote for Obama regardless of what he does; they constitute his base. With no credible third-party candidate in the race, 43% does not equal a plurality. Fifty percent disapproval suggests he has lost the independents.
Other pollsters are getting different numbers more favorable to Obama, time will tell which polling house is more accurate.