Washington Examiner: A group of senators are trying to resuscitate global warming legislation, but the potential inclusion of a new gas tax threatens to keep action on one of President Obama’s signature initiatives stalled. Sens. John Kerry, D-Mass., Lindsey Graham, R-S.C., and Joe Lieberman, I-Conn., have pushed aside the politically unpopular idea of passing a “cap and trade” system for regulating most emissions and would instead go after power plants, motor vehicles and manufacturers with targeted …