WASHINGTON (AP) — Contentious from its conception, President Barack Obama’s health care law has survived the Supreme Court, a battle for the White House and rounds of budget brinkmanship. Now comes the ultimate test: the verdict of the American people.

A government shutdown could dampen the rollout Tuesday as insurance markets open around the country. But it won’t stop the main components of “Obamacare” from going live as scheduled, glitches and all. The biggest expansion of society’s safety net since Medicare will be in the hands of consumers, and most of their concerns don’t revolve around ideology and policy details.