WASHINGTON (AP) — The government shutdown has begun. And it’s plunging the U.S. into a fresh cycle of uncertainty. President Donald Trump and Congress failed to strike an agreement to keep government programs and services running by Wednesday’s deadline. Roughly 750,000 federal workers are expected to be furloughed and many offices will be shuttered. Trump vows to “do things that are irreversible, that are bad” as he seeks to punish Democrats. His administration has called for mass firings. Democrats picked this fight as they demand funding to save health care subsidies that are expiring and sending insurance costs soaring. Republicans have refused to negotiate. More voting is expected Wednesday.