– President-elect Joe Biden's pick to lead the Office of Management and Budget is quickly emerging as a political battle that could disrupt his efforts to swiftly fill out his administration. He called her “maybe (Biden's) worst nominee so far" and “radioactive.”Such sentiment is notable considering the GOP's general reluctance to criticize President Donald Trump's broadsides on Twitter. But like all of Biden's nominees, Tanden has little margin for error as she faces confirmation in a closely divided Senate. At OMB, Tanden would be responsible for preparing Biden’s budget submission and would command several hundred budget analysts, economists and policy advisers with deep knowledge of the inner workings of the government. That would allow them to pass special budget legislation that could roll back Trump’s tax cuts, boost the Affordable Care Act and pursue other spending goals.