I'm in Chicago and support the CTU...but this is a local issue involving a lot more than the money (which is being grossly misrepresented as is always the case in a teacher's strike). Nonetheless it's still a local issue. The President's job is to oversee the Federal and I've rarely known of a President who will take sides in a labor dispute...and the one's I recall were against the union (Raygun & Patco).
Yes there are some issues that do have national implications for teachers should Rahm be able to get the Charter school program he wants but it's also an issue that the NEA and other teaching organizations and unions are going to have to fight...district by district. There should be no need for federal intervention if the unions can show some solidarity (sadly I'm not seeing that with the Chicago strike) and begin to turn the corner on 30 plus years of very bad PR. The President can't make people see the unions as being beneficial for workers...only unions can...and they need to if they're to keep from losing more members and situations such as this.