Bosco,
It wasn't a speech or prepared remarks of any kind. These were extemporaneous comments at a private fund raiser. Setting aside the comments for a moment, let's understand the context.
There are no extemporaneous comments from a presidential candidate. Everything he says - everything - is prepared, and is fodder for the opposition. If a candidate thinks he can make private comments while on the campaign trail, then he's too naive to be president.