Obama Expected to Announce Trade Complaint Against China WASHINGTON - President Obama, kicking off a two-day campaign bus tour through the manufacturing heartland of Ohio and Pennsylvania, is expected to announce on Thursday that the United States will file a trade complaint against China for new duties it imposed on American-made cars and trucks, including the Ohio-built Jeep Wrangler. China levied the duties, which the administration said cover about $3.3 billion worth of auto exports to China, after the Obama administration bailed out General Motors and Chrysler in the wake of the financial crisis in 2008. Mr. Obama has used his administration's saving of the auto industry as a calling card in the industrial Midwest, particularly in Ohio, which is seen as a bellwether in presidential elections. In a recent survey by Quinnipiac University, Mr. Obama was leading his Republican challenger, Mitt Romney, in Ohio by 47 percent to 38 percent - his largest lead in recent polls, which have consistently showed a close race. Mr. Romney opposed the administration's bailout, and Mr. Obama loses few opportunities to remind voters in Ohio, Michigan and other states with automotive factories that his opponent advocated allowing Detroit to go bankrupt. Taking a tough line toward China on trade issues is a tried-and-true strategy during election years. The administration's action builds on a complaint filed in March against China for its alleged hoarding of so-called rare earth minerals, which are used to manufacture a range of sophisticated technology products. Mr. Romney has called for much tougher steps against China on issues like intellectual property and currency policy. He has said he would label China a currency manipulator - a step that the Obama administration has steadfastly resisted. The Obama campaign is calling this tour, which will wind from industrial areas outside Toledo to near Cleveland and on Friday to Pittsburgh, the "Betting on America" bus tour. Jeep Wranglers are manufactured in a factory in Toledo. News of the administration's trade action was first reported by The Toledo Blade.