1) The case against Hillary as Presidential standard-bearer was this:
If elected, her spouse would reside in the White House and be, arguably, a daily influence if not actual, unconfirmed advisor -- a problem only in that her spouse has already served the maximum two terms as President residing in the White House. This is not unconstitutional. This does raise 'Constitutional eyebrows', an alert, that earlier, fairly recent power hasn't been sufficiently severed.
2) The case against Sarah Palin as Vice-Presidential standard-bearer is this:
Had anyone stood blindfolded in any American shopping mall, been twirled around, then stopped to find the first woman they stumbled into, the odds would be strong of picking someone about as adequate.