Every US resident has three offices that do immigration casework: your House representative and both senators. Their intake rules differ office by office. Pick your state to see yours.
The office asks USCIS about your case through a dedicated channel USCIS answers. It cannot order an approval, and no honest person promises it speeds anything up. It gets your case looked at, and the reply joins your dated record.
Federal privacy law: USCIS cannot discuss your case with a congressional office until you authorize it in writing. Every office has its own form, and some require ink signatures.
Any of them can help, and their intake rules differ. Contacting one office first is usually better than all three at once - two offices working the same case at the same time can slow both down.
Offices act most readily when a case is already outside normal processing time or a USCIS inquiry has gone unanswered. The free check computes those dates for your exact case.
The free check answers it with a date. No account needed.
Every office's intake, verified by hand and re-checked weekly.
Office intake rules from each office's own published casework pages, verified by hand; a weekly monitor re-checks every machine-reachable form. Not affiliated with USCIS or any congressional office. General information, not legal advice.