PORTLAND, Maine (AP) – A poll released Friday showed tepid support for Gov. John Baldacci going into the Democratic Party’s annual convention, but the incumbent still leads all of his opponents in head-to-head matchups.

The poll by Critical Insights indicated that only 39 percent of those surveyed said Baldacci should be re-elected for a second term this November.

In a separate question, Baldacci’s approval rating remained relatively unchanged at 47 percent, while 39 percent of those polled did not approve of the job he’s doing. Twelve percent of the respondents weren’t sure.

Baldacci’s approval ratings have leveled off over the past year after being as high as 72 percent in fall of 2003.

The statewide telephone poll of 604 residents was conducted between May 24-30 by Critical Insights, which conducts surveys each spring and fall. The margin of error for the poll was plus or minus 4 percentage points.

The poll showed that two-thirds of Mainers still don’t know any of the three Republicans vying to challenge Baldacci: David Emery, Peter Mills and Chandler Woodcock.

The poll provided an early snapshot of the gubernatorial race by pitting Baldacci against three GOP candidates.

It showed Baldacci with a 13-point lead over Emery, a 17-point lead over Mills and a 23-point lead over Woodcock. Against Green Independent Pat LaMarche, Baldacci had a 35-point lead. But about a quarter of respondents were undecided.

The economy continues to be on the minds of Mainers, with 52 percent of respondents believing the economy was worse than a year ago, the poll said. That actually represented an 18-point improvement from a year ago. Forty-four percent of respondents anticipate that the economy will get worse in the coming year, the poll said.