MGM is expected to take 7 percent of Horseshoe’s business and 16 percent of Maryland Live’s in 2019, according to a December 2013 study by Cummings Associates, a consulting company commissioned by the Maryland Lottery and Gaming Control Agency. With the opening of the MGM National Harbor in Prince George’s County in 2016, the competition will get even more intense. In the past ten months, Maryland Live’s market share has dropped to 60 percent. Maryland Live’s market dominance was challenged by Horseshoe Baltimore, a similar-sized gaming facility opened 13 miles away in downtown Baltimore in August 2014. Maryland Live, the largest casino in the state, accounted for 76 percent of the state’s total casino business in 2014, with its 4,200 slot machines and 189 gaming tables, according to the Maryland State Lottery and Gaming Control Agency. But for casino operators, surviving and prospering becomes increasingly challenging in a climate of fierce competition. COLLEGE PARK - Maryland’s casino industry has been growing at a double digit pace since casino table gaming was legalized in 2012.