Investor’s Business Daily: Top senators backed away from offshore drilling in a major new energy bill unveiled Wednesday, revealing the dramatic shift in drilling politics since the oil spill in the Gulf of Mexico began last month. The bill, authored by Sens. John Kerry, D-Mass., and Joe Lieberman, I-Conn., would let a state ban drilling within 75 miles of its coastline vs. 3 miles currently. A state also would be able to veto neighbors’ drilling projects if a mandatory study indicated that an accident …