Your weekend guide to races, and horses, of interest in the mid-Atlantic region.  The De Francis Dash highlights the region’s racing, while Parx hosts a pair of South Carolina residency races, and a hard-knocker goes for $1 million in career earnings. Meanwhile, two runners from the Mid-Atlantic Thoroughbred/The Racing Biz Top Midlantic-bred Poll — Ben’s Cat and Favorite Tale — are slated to run in the De Francis, though the former is expected to scratch.  Here’s what’s on tap:

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