Can the only way Mccain can win is to discredit Obama?

On the issues McCain cannot possibly win because everyone hates Bush and on every single issue most people agree with Obama such as: Iraq, health care, abortion, guns, gay rights, etc. Very few people suopport the quagmire that is Iraq that has killed 1 million Iraqis, and the economy is in a recession because of the: high unemployment, inflation, stagflation, outsourcing of jobs, automation, weak dollar, huge debt, trade deficit, housing mess and the high gas prices.