GOP centrists push Democratic ObamaCare discharge petition to 218-signature threshold

Disgruntled centrist Republicans raced on Wednesday to sign a Democratic discharge petition extending ObamaCare subsidies for three years, providing the definitive 218 signatures to force a vote on the bill over the opposition of GOP leaders.  Reps. Brian Fitzpatrick (R-Pa.), Mike Lawler (R-N.Y.), Rob Bresnahan (R-Pa.) and Ryan Mackenzie (R-Pa.) went to the chamber floor…