'Obamacare' is once again at serious risk, says Julian Zelizer. Zelizer: The Republican right would like to destroy the entire safety net that exists now in the United States.

He says the percentage of Americans without health insurance has dropped nearly in half since 2010. If anything, the success of Obamacare's'success will not deter Republicans who want to destroy it,' Zelizer says. that it will really improve the lives of Americans, because improving their lives is not the main objective of his.