CQPolitics.com: Delegates from around the world have spent the past two weeks wrangling with the hundreds of complex details that go into writing a new global agreement on fighting climate change. But when President Obama arrives in Copenhagen on Friday morning, his hopes for closing a deal may boil down to two basic issues: trust and money. By linking the two as part of a grand bargain, Secretary of State Hillary Rodham Clinton sought to break an impasse between the United States and China. She said …