From our friend Byron York:

Anyone who followed this year’s Senate race in Kansas — the one longtime GOP incumbent Pat Roberts appeared to be losing to Greg Orman, the businessman running as an independent — knows Orman and his supporters vigorously denied Roberts’ allegation that Orman was really a Democrat running to further the Democratic agenda.
“By word, by deed, by campaign contribution, this man is a liberal Democrat,” Roberts said of Orman during a debate in October. “A vote for Greg Orman is a vote to extend the Barack Obama/Harry Reid agenda.”
Not true, Orman answered. “The senator can say that over and over again, but it doesn’t make it so.”
What voters did not know was at that very moment, Democratic Majority Leader Harry Reid’s political action committee, the Senate Majority PAC, was preparing to pour more than a million dollars into the pro-Orman effort in Kansas. Reid was just waiting to make sure the donations came so late in the campaign that the public wouldn’t find out about them until after the election.
The key day was Oct. 16. Election law stipulates that any contribution received before Oct. 16 had to be publicly disclosed to the Federal Elections Commission before election day. But anything received on Oct. 16 or later would not be disclosed until after voters went to the polls.