Oaklawn Park’s Presidents Day feature is the Grade III, $500,000 Southwest Stakes, which lured 11 three-year-olds. The second milestone on Arkansas’ road to the Kentucky Derby is worth 10 Derby points to the winner. The 1 1/16th-mile Southwest, the ninth of 10 races on the day at Oaklawn, goes postward at 6:09 p.m. EST. #5…