The head of MGM Resorts International, which owns Borgata Hotel Casino & Spa, says his company is committed to the seaside resort and will continue to invest in it — even as it seeks to expand its operations in neighboring New York. The Press of Atlantic City reports, speaking Tuesday at the start of the East Coast Gaming Congress, a major gambling conference, Bill Hornbuckle spoke about his company’s businesses around the country and around the world, stressing Atlantic City remains an important part of its portfolio.