U.S. job openings fell in February as rising uncertainty over the economy due to tariffs on imports curbed demand for labor. Job openings, a measure of labor demand, dropped 194,000 to 7.568 million by the last day of February, the Labor Department's Bureau of Labor Statistics said in its Job Openings and Labor Turnover Survey, or JOLTS report, on Tuesday. Data for January was revised slightly higher to 7.762 million vacancies instead of the previously reported 7.74 million. Economists polled by Reuters had forecast 7.61 million unfilled positions.