Bloomberg: President Barack Obama may need to give away as much as 70 percent of greenhouse-gas emissions permits to win support for his cap-and-trade program, Merrill Lynch & Co said. The budget blueprint Obama sent to Congress yesterday foresees revenue of $645.7 billion by 2019 from the sale of permits to polluters from 2012. Obama will likely have to cut the amount of allowances sold to about 30-50 percent of the initial total to win support, Abyd Karmali, the London-based head of …