The Times reports.

On the way to winning back the majority in the House on Tuesday, Republican challenger after Republican challenger overcame significant fund-raising gaps to beat their opponents, bolstered by a deluge of spending by independent groups.

UPDATE: Sometimes losers outspent winners.  The Post explains.

In two-thirds of the House seats that Republicans picked up Tuesday, Democratic candidates had more money behind them than Republicans, according to a Washington Post analysis of data from the Federal Election Commission.