Despite pleas from the White House, some Democratic activists are gearing up for a renewed onslaught against ... Democrats. Democracy for America, the liberal grassroots political action committee founded by Howard Dean, the former chairman of the Democratic National Committee and governor of Vermont, is appealing for money to continue its campaign against what it calls "Insurance Industry Democrats." They include Senators Blanche Lincoln of Arkansas and Ben Nelson of Nebraska. The two joined a party-line vote Saturday to allow the Senate to begin debating healthcare legislation. But they have vowed to oppose one of its key elements—the creation of a government-run insurance plan, known as a public option, to compete with private insurers.