[bubblethink]

You can try federal litigation. Litigation attorneys are typically different from other immigration attorneys. There are lawsuits based on unreasonable delay, but it's highly variable and will depend on your individual case. 15 months isn't that long, but there isn't a strict upper bound anyway. The best case in these lawsuits is that the government settles or issues your benefit rendering it moot.

It doesn't strictly matter who your rep is. It can be a house rep or a senator. They all fill some form and it goes through the same channels.

[proberts]

Good point. Mandamus actions - forcing the Government to act - often work in fact and there are some very good attorneys who specialize in this and I'd be happy to refer some to you. We don't handle these types of matters but have worked with several attorneys that do.