KEY POINTS
  • Welch gives Trump a "D minus" on his management of the White House but an "A" on the policy front and in his Cabinet and Supreme Court picks.
  • He says he'd also give Trump an "A" for boosting morale among businesses and consumers.

Jack Welch, the former CEO of General Electric who has President Donald Trump's ear, told CNBC on Wednesday that an impeachment would crush the stock market.

"An impeachment proceeding would blow the market away," Welch said on "Squawk Box."