Hi there,
I hate to disappoint you, but this question has been asked and answered more than once here on the forum. But to make it short, unless you have the legal right to live and work in the States no Us carrier will hire you! Not to mention sponsoring, why should a US airline go through the hassle of doing a huge pile of paperwork and explain why the f*** they want to hire a foreign pilot over a US pilot who is equally qualified? Especially in light of the Trump administration, who want's to kick out all foreigners anyway. Come on, lets be realistic, that's absolutely ridiculous!