After he lost the lieutenant governor's race four years ago to Republican Rick Perry, Democrat John Sharp said Texas wasn't a Republican state, just a Bush state. Even with George W. Bush coasting to re-election, Sharp came within 2 percentage points of winning. This year, Bush closed a 15-day national campaign tour in Texas, and Republicans urged a straight-ticket vote to help the president. Bush might as well have been on the ballot, judging from Tuesday's results. After the Sept. 11 terrorist attacks, Bush's popularity skyrocketed. It remained high even as Democrats pointed out that the economy was sputtering. Meanwhile,...