A second poll released this week shows Rep. Ed MarkeyEdward (Ed) John MarkeyRegulators seek to remove barriers to electric grid storage Markey, Paul want to know if new rules are helping opioid treatment Oil spill tax on oil companies reinstated as part of budget deal MORE (D-Mass.) holding a single-digit lead over Republican Senate candidate Gabriel Gomez, a further indication that the race for Secretary of State John KerryJohn Forbes Kerry2020 Dem contenders travel to key primary states When it comes to Colombia, America is in a tough spot 36 people who could challenge Trump in 2020 MORE's former seat could be tighter than anticipated.

The survey, by Emerson College, shows Markey with a 42-36 percent lead over Gomez. The six-point advantage is slightly above a Public Policy Polling survey released Friday that showed Markey with a 44-40 percent advantage.

But the narrow advantages are an early disappointment for Markey, who was thought to have an easy path to the Senate after prevailing in Tuesday's Democratic primary. More than 60 percent of Massachusetts voters chose President Obama in 2012, despite former Mass. Governor Mitt Romney earning the Republican nomination.

The Emerson College survey found that both candidates enjoy relatively high favorability ratings — Markey at 48 percent and Gomez at 45 percent — and that Gomez, a former Navy SEAL, enjoyed broad support from independents and men. According to the survey, those without a party affiliation are breaking for Gomez 46-25 percent, while men back Gomez 44-37 percent.

Still, Markey has an advantage among females at 46-29 percent, and enjoys a concentrated base of support within the city of Boston, where he holds a 57-19 percent lead. And Markey holds both a sizable fundraising advantage and the backing of the White House - first lady Michelle ObamaMichelle LeVaughn Robinson ObamaMichelle Obama celebrates success of ‘Black Panther’ How textbooks shape teachers — not just their students Michelle Obama dedicates Valentine's Day playlist to Barack Obama MORE has already scheduled a Boston fundraiser in support of his campaign.

Still, Democrats remain wary of taking the special election for granted after 2010, when former Sen. Scott Brown (R-Mass.) upset Mass. Attorney General Martha Coakley.

Massachusetts votes head to the polls on June 25.