Want to see what the end of a Rasmussen bounce looks like? Well, here it is.

As you can see,  on the third day of this bounce,  Obama's "strongly Approve" percentage has fallen by 2 percentage points.  That is his base and their level of enthusiasm.  It was above 45% in 2008 and he won that election by just 7 points. His 52% "Total Approval" is in its third day,  something that has not been the case since the week prior to the signing of the 2009 Stimulus  (Feb 17, 2009).  While his "Total Approve" numbers,  now,  are similar to most of 2009,  his "Strongly Approve" are a disaster and have never returned to the high's he experienced when he was at his best.  Understand that the "Strongly Approve" number represents both the enthusiasm of his base and,  to a great extent,  the turn-out for the coming election.  None of this is where Obama wants it to be.  

Date	Presidential Approval Index	Strongly Approve	Strongly Disapprove	Total Approve	Total Disapprove
9/11/2012	-10	30%	40%	52%	47%
9/10/2012	-9	32%	41%	52%	47%
9/09/2012	-10	32%	42%	52%	47%

With the chart below,  Obama remains 3 points up (actually 2.5 points),  but is falling in the polling data and the fall is nearly 2 points.  Romney's percentage has fallen,  as well,  but only half a percentage point.  And this,  ladies and gentlemen,  is what the end of a bounce looks like.  Understand that since the first of April,  Romney has been "up" on Obama about 85% of the time.  

One more thing:  if both men drop in their approval numbers at the same time, i.e. this particular poll,  we might assume the electorate is discouraged or disinterested, to some extent.  But,  if the drop is notably more for one candidate than the other,  the drop may be more a problem with that candidate.