CHICAGO (AP) — Millions of Americans will be able to shop for the first time today on the insurance marketplaces that are at the heart of President Barack Obama's health care reforms.

The market places are opening in all 50 states, and the Obama administration hopes to sign up 7 million people during the first year.

The partial government shutdown will have no immediate effect on the insurance marketplaces because they operate with money that's not subjected to the annual federal budget.