Can you be fired for asking an employeer for your pay in the US, what action can be taken if terminated for this reason?

Depends what you mean. Do you mean your employer is withholding your pay? That’s ILLEGAL, and you can sue. You earned that pay legally, they cannot keep it from you.

You shouldn’t ever have to ask for your pay. It should be automatic, on a set time schedule and deployed to you without your request. If I *EVER* had to request to be paid for my work… I’d immediately be looking for a new job. Fuck that noise. Payroll being fucked up is one of the last major signs before a company collapses.