As far as I understand it, conventional wisdom on the right and the left are that the following vice presidential choices were nixed by the McCain campaign because they were pro-choice: • Tom Ridge, the popular former governor of Pennsylvania. • Joe Lieberman, the heretical Democrat. • Kay Bailey Hutchison, otherwise a down-the-line conservative senator. • Jodi Rell, arguably the most popular governor in the country. And so instead we got Sarah Palin. Sometimes I don't think it's fully appreciated how constrained the GOP is by its pro-life orthodoxy.