WASHINGTON — With Republicans mobilizing against the proposed health care overhaul, President Obama, Congressional Democrats and leading advocacy groups are laying the groundwork for an August offensive against the insurance industry as part of a coordinated campaign to sell the public on the need for reform. The effort will feature town-hall-style meetings by lawmakers and the president, including a swing through Western states by Mr. Obama, grass-roots lobbying efforts and a blitz of expensive television advertising. It is intended to drive home the message that revamping the health care system will protect consumers by ending unpopular insurance industry practices, like refusing patients with pre-existing conditions.more.