You're making the EXACT SAME MISTAKE that McCain did, Mitt!
2008: In appointing Sarah Palin as his vice presidential running mate, John McCain has taken his own trump card off the table. The only real weapon he’s had is Obama’s youth and inexperience --and he’s flip-flopped by choosing a running mate who is even MORE youthful and inexperienced!
2012: By refusing to publish his tax returns (something that presidential candidates have been doing for decades), Mitt Romney has taken his own trump card off the table. The only real weapon he’s had is the support of independent and swing voters disgruntled by Obama's lack of "change" -- and he's thrown it away by refusing to display the most basic level of financial transparency!