I have no problem with anyone who can afford to do so filing suit, I merely question the ability of any plaintiff to prevail against legislation that has already been ruled constitutional.
Unless there can be a factual showing, after discovery, that there was intentional illegality, wrongdoing like fraud, or gross negligence on the part of a government official that directly affected the plaintiff, they will go exactly nowhere, regardless of procedural issues.
The Supreme Court ruled in 1982 that presidents may never be sued in office or after departing office for official acts undertaken as president. In that case, Nixon v. Fitzgerald, the court based its reasoning in part on the argument that it would be too burdensome to a president to have to defend himself against civil lawsuits while trying to serve effectively as president.
http://en.wikipedia.org/wiki/Nixon_v._Fitzgerald