(For a Reuters live blog on U.S., UK and European stock markets, click LIVE/ or type LIVE/ in a news window.) * Futures down: Dow 1.6%, S&P 1.3%, Nasdaq 1% Oct 28 (Reuters) - U.S. stock index futures fell on Wednesday, as rising coronavirus cases globally triggered fears of lockdowns disrupting a nascent economic recovery, while concerns over a contested presidential election also weighed. Wynn Resorts and United Airlines Holdings, companies sensitive to restrictions, dropped more than 1% in premarket trading. Energy firms such as Occidental Petroleum Corp fell 2.8% on concerns over fuel demand.