WASHINGTON (AP) — Republicans were for President Barack Obama’s requirement that Americans get health insurance before they were against it.

The obligation in the new health care law is a Republican idea that’s been around at least two decades. It was once trumpeted as an alternative to Bill and Hillary Clinton’s failed health care overhaul in the 1990s. These days, Republicans call it government overreach.

Mitt Romney, weighing another run for the GOP presidential nomination, signed such a requirement into law at the state level as Massachusetts governor in 2006. At th...