Freaking 'A' - why on earth would ANYONE assume we couldn't find a qualified President under the current constitutional standards? (Oh, yah - our current 'messiah' refused to even provide a legal copy of his birth certificate - I guess 'constitutional standards' are not what they used to be... ;>)
But, but, but... it's just not fair to exclude all those good immigrants from the American dream, that you can be anything if you work hard...
At least, that is the argument I remember hearing most often.