David Wasserman not only has been tracking the presidential vote totals, he also has been tracking the vote for U.S. House by party. See this chart, which shows the vote for each district by party. His chart shows that Democratic nominees for U.S. House received more popular votes than Republican nominees did, yet, as is well known, Republicans won more seats.
His chart lumps in votes received on minor party labels into the major party columns, in instances in which a congressional candidate is nominated by both a major party and a minor party. But if he separated out the minor party votes for fusion nominees, the chart would still show more popular votes for Democrats than for Republicans. The January 1, 2013 Ballot Access News paper edition will also have a chart showing the vote by party for U.S. House, by state, but the BAN chart will not merge the minor party vote into the major party columns in cases of fusion.