[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/06/24/art.obamapoll.ap.jpg caption="Obama is up big in a new poll."]
(CNN) - With just over four months to go until voters weigh in at the polls, a new survey suggests Sen. Barack Obama is holding a double-digit lead over Sen. John McCain among registered voters.
According to a new Los Angeles Times/Bloomberg poll, Obama holds a 12 point lead over McCain in a head-to-head match up, 49 percent to 37 percent. But when third party candidates Ralph Nader and Bob Barr are added to the list, Obama's lead over McCain extends to 15 points, 48 percent to 33 percent.
The survey is the second in a matter of days to indicate McCain may face a sizable deficit as the general election campaign kicks off. A Newsweek poll released four days ago showed the Illinois senator with a 15 point lead.
According to a CNN analysis of five recent national surveys, Obama holds an 8 point lead over his presidential rival.
CNN Polling Director Keating Holland notes a substantial lead in June does not always lead to a decisive victory the following November.
“Historically speaking, when June polls show a tight race, the race usually remains tight all the way through November. But when June polls have shown a big lead for one candidate, that lead has often melted," Holland said.
"Bill Clinton was leading Bob Dole by up to 19 points in June, 1996; Clinton won by eight. Michael Dukakis had a 14-point lead over George Bush the elder in June, 1988; Bush won by seven. Jimmy Carter was up nearly 20 points in June, 1976 but in November eked out a two-point win. And Richard Nixon managed an even smaller victory in 1968 even though he had a 16-point margin that June," Holland noted.
The Los Angeles Times/Bloomberg poll indicates Obama is clearly benefiting from the nation's economic woes. Voters rate the economy as the most pressing issue facing the country and say Obama is likely to handle the issue better than the presumptive Republican nominee. Voters say McCain is better suited to handle the war against terror, but the poll indicates that is not currently their top concern.
The poll also indicates the conservative base has yet to fully embrace their party's nominee. Among voters who self identified themselves as conservative, just under 60 percent said they would vote for McCain, fifteen percent said they would vote for Obama, 15 percent said they would vote for another candidate, and 13 percent said they were undecided.
That compares to the nearly 80 percent of self identified liberals who say they plan to vote for Obama.
As for former supporters of Hillary Clinton, the poll finds only 11 percent aren't planning on supporting Obama.
The poll surveyed 1,115 registered voters and was conducted from June 19-23. It carries a margin of error of plus or minus 3 percentage points.