Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: President Barack Obama threw off the gloves and took a direct punch at one of his possible successors, likely Republican presidential candidate Scott Walker, in an interview airing this morning. Responding to Walker's claims that he'd 'absolutely' cancel or 'disown' a deal with Iran on 'day one' if elected to higher office, Obama told NPR Morning Edition host Steve Inskeep that such an approach 'would be foolish.' 'And, you know, perhaps Mr. Walker, after he's taken some time to bone up on foreign policy, will feel the same way,' the president added. Walker fired back at Obama on Twitter, saying, 'Americans would be better served by a President who spent more time working with governors & Congress rather than attacking them.'The president took a jab at the Wisconsin governor during an interview with NPR Morning Edition host Steve InskeepObama was responding to Walker's claims that he'd 'absolutely' cancel or 'disown' a deal with Iran on 'day one' if elected to higher officeJab at Walker departed from the White House's general strategy of staying out of the race to replace the sitting presidentWalker fired back on Twitter: 'Americans would be better served by a President who spent more time working with governors & Congress rather than attacking them'Obama defended the informal agreement his administration made with Iran and the shift toward Cuba, which it may take of its list of terrorist countries 
 Question:The president said his most pressing concern was whether he could effect the United States' relationship with the communist country in a way that 'benefits the _ people over the long term.'

Cuba