According to a Quinnipiac University poll released Thursday Lamont is ahead 51-47 percent among likely voters in the Aug. 8 Democratic primary. That compares to a 55-40 percent lead for Lieberman in a similar poll in June. The telephone survey of 2,502 registered voters was conducted July 13-18. It has a sampling error margin of about 2 percentage points. But the error margin among the 653 likely Democratic primary voters is 3.8 percentage points, putting the candidates in a statistical dead heat. The poll shows him leading a three way race with the support of 51 percent of likely voters, compared to 27 percent for Lamont and 9 percent for Republican Alan Schlesinger. http://www.boston.com/news/local/co.../07/20/lamont_leads_lieberman_in_latest_poll/