Senate Republicans: From 'hell no' to 'not so sure' on Obamacare

Joni Ernst promised to “unload” on Obamacare in a 2014 campaign ad that featured her firing a gun as a narrator described what she would do to the Democratic health care law.

But three years after winning election to the Senate on a vow to seek an “immediate" repeal of the law, the Iowa senator is being very careful about pulling that trigger.