No front-runner has proposed such sweeping changes to how businesses operate. A President Warren would seek to regulate big tech companies as utilities, break up big banks and split them from securities dealers, ban fracking of oil and gas, phase out carbon emission from buildings, cars and power plants in eight to 15 years, require big companies to appoint worker representatives to at least 40% of board seats, ban private health insurance and, effectively, for-profit college, and negotiate down drug prices.