• Cable has traded a 26 pip range thus far Tuesday; 1.3397-1.3423

• 1.3397 is low water-mark since Monday's six-week high of 1.3447

• Trump faces midterm verdict with control of Congress at stake

• Iran-US deal still out of reach, senior Iranian official tells Reuters

• US-Iran tensions inflate oil prices: Brent, WTI up over $2 per barrel

• BBC-European Commission, UK agree deal over British food exports to EU

GBPUSD

(Robert Howard is a Reuters market analyst. The views expressed are his own)