Sen. Charles Schumer (N.Y.), the Senate Democrats’ political guru, has a plan to poison the Tea Party by driving a wedge between its rich funders and its blue-collar rank and file. Schumer, one of the Democrats’ most influential strategists, will argue in a major speech on Thursday that super-wealthy Tea Party donors have hijacked the grassroots movement that grew out of the economic anxiety of the 2008 financial collapse to suit their pro-big business agenda. He’ll lay out a blueprint for how Democrats can exploit what he argues is a weakness in the opposition in the address at the Center...