Can USCIS Discontinue H-1B Extensions Beyond 6 Years? In my opinion, the answer is: no. Can they try? Yes, but they will need to change the law through the Congress. Drastic changes through executive action are legally unavailable.
Immigration related consequences of the government shutdown
21 January 2018
USCIS has provided the following update:
The current lapse in annual appropriated funding for the U.S. government does not affect USCIS’ fee-funded activities. Our offices will remain open, and all applicants should attend interviews and appointments as scheduled.