He was not the choice of Republicans - he was the choice of Claire McCaskill and the Democrats. Without them he would not have even been on the radar - she spent millions to assist him in getting the nomination apparently with good reason.
If this scandal was contained only within the state of Missouri, you might have a point - but it was not. It became a national issue used to brand all pro-life conservatives and blunted the momentum we were clearly building going into the convention and overshadowed it. Akin’s conduct and refusal to take responsibility and step aside for the sake of the credibility of the issues he claims to care so much about has caused an extraordinary amount of damage which makes the task all the more difficult.