Former EPA administrator Christine Todd Whitman says dropping out of the accord could undercut America's position in the world. Prior to that, Brian Levitt, OppenheimerFunds' senior investment strategist, says stocks are still cheap. Andrew Balls, PIMCO's CIO of global fixed income, says higher rates will come in the U.K. Finally, Steven Cohen, executive director of Columbia University's Earth Institute, says greenhouse gasses will decline no matter what Trump decides on the Paris Agreement.