Americans lacking health insurance will be able to sign up for coverage beginning Tuesday, federal officials say, despite Tea Party Republicans’ best efforts to torpedo President Obama’s health care law or cripple its implementation. But the debut of the health insurance marketplaces – a critical component of the law that mandates most Americans obtain insurance by January – is being tarnished, politically and practically, by the threat of a government shutdown. Full story for BostonGlobe.com subscribers.
Matt Viser of the Globe staff contributed to this report. Tracy Jan can be reached at email@example.com.