A month after former Governor Mitt Romney’s loyalists were trounced by supporters of Ron Paul in his home state caucuses, the Massachusetts Republican Party is trying to invalidate results - a move that has infuriated rank-and-file Republicans who accuse establishment insiders of bending the rules to their own benefit. The challenges could change the makeup of the delegation that Massachusetts is expected to send to the Republican National Convention in Tampa in August, though it won’t affect the Republican nomination for president. Based on Romney’s strong primary win in Massachusetts, the delegates to the convention are all committed to vote for him and Paul has dropped out of contention.