TDN's Senior Racing Editor Steve Sherack provides analysis for Saturday's pair of GI Kentucky Derby preps--the GII TwinSpires.com Louisiana Derby at Fair Grounds and GIII Jeff Ruby Steaks at Turfway Park. Results (Weekend of Feb. 28) - Commandment (Into Mischief) ($6.80 winner of GII Coolmore Fountain of Youth) and Class President (Uncle Mo) ($19.00 winner of GII Rebel) made it a profitable weekend at the windows for this column, both delivering wins in dramatic fashion. Hammond (Charlatan), meanwhile, was a disappointing sixth at 8-1 in the GIII Gotham. GII TwinSpires.com...