I would say there is a 50/50 chance that the government has access to any http certificates that it needs to crack any https session that they would like to crack. The Patriot Act created secret courts to enable this type of stuff. They're well known to rubber stamp any warrant that comes through.
And it is not unimaginable that the US government can crack the RSA. That would explain why they are not requiring people to use short keys, yet still collect the data worldwide.
