No they did not win the popular vote for the house again. They lost the popular vote for the house both in 2012 and 2014. They won it for the first time in 6 years by a 3 million majority. That should amount to a tiny majority in the house not a 50 seat advantage.
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Where did I blame the senate result on gerrymandering? I said the house and state elections. And it is true that gerrymandering has given them a massive advantage there.