Mara Liasson

Democrats' success in this month's elections was bigger than expected, and was fueled in part by strong opposition to President Trump. In the past few weeks, there's been a lot of chatter about whether that means a big, blue wave is forming off the political coast that could potentially crash into the 2018 midterm elections.

We asked Republicans and Democrats what the off-year elections could mean for their parties next year. Here are five takeaways.

1. Good news for Democrats

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When Donald Trump won the election a year ago, he promised to be a transformational president, to drain the swamp, shake up the establishment and do away with gridlock. He also predicted that being president would change him.

A year ago Donald Trump defeated Hillary Clinton, and the surprises haven't stopped since.

He promised to be a transformational president, to "drain the swamp" and shake up the establishment.

And he promised that being president would change him — saying that he could become more "presidential" than anyone except Abraham Lincoln.

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