The Most Misleading Number About the Tea Party and the Senate

Former U.S. Senate candidate Christine O'Donnell signs copies of her book "Trouble Maker" at a Virginia Tea Party rally at Fort C.F. Smith on August 18, 2011 in Arlington, Virginia.

In one of the 500 "both sides share the blame" columns that National Journal is required to run every day, Charlie Cook repeats the least useful "data point" about the Tea Party's role in dragging down the GOP.

In 2010, the GOP lost five of the seven Senate contests The Cook Political Report rated as toss-ups going into Election Day; in 2012, it lost eight of 10. When a party loses 13 of 17 toss-ups over two elections, it has a problem. In many cases, Republicans nominated horrifically flawed candidates who didn’t quite self-destruct but were too weak to win. In other cases, they nominated candidates who did self-destruct. And when these problematic candidates pulled the pin on the grenade, other GOP office-seekers in their states became collateral damage.

By David Weigel