Shouldn’t George W. Bush be standing at Romney’s side

I’m a Little Disappointed

By James Turnage:

The last Democratic President, before Mr. Obama, Bill Clinton, is campaigning with the President in the final days. He is popular, and is remembered for policies that helped the middle class.

My question is “why isn’t the last Republican President campaigning with Mitt Romney”? Shouldn’t George W. Bush be standing at Romney’s side giving his support and making grandiose statements about his policies? I would think having a former leader of your party at your side in the final days would be a big boost.

Maybe they just don’t get along well. Or maybe Paul Ryan told Romney not to bring another political figure into the mix.

I just don’t understand.