By Trevor Hunnicutt and Jarrett Renshaw TOKYO (Reuters) -The White House is weighing an emergency declaration to release diesel from a rarely used stockpile in a bid to address a major supply crunch and blunt rising prices, an administration official said on Monday. U.S. President Joe Biden has declared that tackling inflation and high gas prices is the priority of his administration ahead of congressional elections in November. Republicans seeking to regain control of Congress have used the surge in prices to bludgeon Democrats. Diesel is essential for the U.S economy, powering farms and the …