In 2012, Republicans unanimously made a vow. If their party captured the White House, they would repeal President Obama's signature achievement, the Affordable Care Act.
In 2016, they've added something else: the reversal of Obama's signature foreign policy achievements, his outreach to hostile nations.
In his second term, Obama has been working to restore diplomatic relations with Cuba for the first time in more than half a century. His administration has also been negotiating a deal to limit Iran's nuclear program.