...bear with me..
...but when a percentage gets really big (like 90...Pres approval rating) and you have a population that may be...say..60/40 liberal/conservative...
Would it not be safe to assume that there are a boatload of >liberals< who agreed with the President's handling of the situation.
I know that my statistics are not scientifically accurate to 10-200...but I think the point can be made with really rough estimates like that...and the President's approval rating has been amazingly high.
Now...of course...what is liberal to many might very well be conservative for you...so I guess it all depends on your point of reference.