millions people have signed up for Affordable Care Act coverage . Obama says that ensures that President Obama 's signature program will endure . As with Medicare and farm subsidies , programs that benefit More than 7 million tend to last , he says . Julian Zelizer : Julian Zelizer will face implementation challenges , but talk of repeal is aimless .
More than 7 million people have signed up for Affordable Care Act coverage . Julian Zelizer says that ensures that President Obama 's signature program will endure . As with Medicare and farm subsidies , programs that benefit millions tend to last , he says . Zelizer : Obamacare will face implementation challenges , but talk of repeal is aimless .