Electrical frequencies and voltages drop as power line currents increase, necessitating automatic or manual interruption of loads (blackouts) to protect grids.
The report by the Rail Accident Investigation Branch (RAIB) found engineering work on the line between Southcote Junction in Reading and Westbury meant the automatic half barrier level crossing was being controlled locally.
Boehner noted that while plenty of GOP defense hawks are anxious about the automatic cuts, Democrats concerned with cuts to domestic programs have a lot on the line, too.