Not unexpected, there was a quick response from the McCain headquarters after Obama's announcement of his VP. The McCain camp started advertising a television ad Saturday using VP candidate Joseph Biden, in his own words, questioning Obama's readiness to be president. It's a simple ad. We now can only wait for McCain to makes his VP announcement,and see how the Obama camp responds.If it's former Massachusetts' governor Mitt Romney that gets the nod, expect a similar ad, with Romney talking down to McCain. http://blogs.wsj.com/[…]/