WASHINGTON (Reuters) - An acquisition of Time Warner Inc by AT&amp;T Inc. could raise significant antitrust issues that the U.S. Senate committee on antitrust would carefully examine, the chairman and ranking member of the committee said Sunday.<div><a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=xz46bdyq_YA:1PePl4jxQq4:yIl2AUoC8zA"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?d=yIl2AUoC8zA" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=xz46bdyq_YA:1PePl4jxQq4:V_sGLiPBpWU"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=xz46bdyq_YA:1PePl4jxQq4:V_sGLiPBpWU" border="0" /></a> <a href="http://feeds.reuters.com/~ff/reuters/technologyNews?a=xz46bdyq_YA:1PePl4jxQq4:-BTjWOF_DHI"><img src="http://feeds.feedburner.com/~ff/reuters/technologyNews?i=xz46bdyq_YA:1PePl4jxQq4:-BTjWOF_DHI" border="0" /></a></div><img src="http://feeds.feedburner.com/~r/reuters/technologyNews/~4/xz46bdyq_YA" height="1" width="1" alt="" />