Mr.Harper also questioned whether the North American Free Trade agreement could be reopened, as Mr.Obama had pledged to do during the campaign, without 'unraveling what is a very complex agreement.

对于奥巴马在竞选期间就北美自由贸易协定重新进行谈判的承诺，哈珀质疑在没有解决非常复杂的协议的情况下是否可行。

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Ambulance service managers say such behaviour will not be tolerated and have pledged to do all they can to prosecute people who attack their crews.

BBC: NEWS | UK | England | Cornwall | Ambulance assaults 'much higher'

What's more likely, is that he's just going to solidify his position of being the front runner in pledged delegates, but there will be other issues to resolve, superdelegates, what do you do with Michigan and Florida, whether or not the Pennsylvania primary might be brought in to in some sense or another, reverse the momentum.

NPR: Day of Reckoning Ahead for Clinton, Obama