On Monday, Texas Sen. Ted Cruz taught the Republican Party a lesson it desperately needs to learn. Mr. Cruz taught the GOP something about winning. The Republican Party, at least at the national level, is pretty pathetic. The Republicans have lost four of the last six presidential elections. Republicans have actually lost the popular vote in five of the last six presidential elections. Even the two races that George W. Bush won were close. The 2000 election was not decided until weeks after Election Day and even in 2004, Democrat John Kerry kept it close enough that he did not...