A new poll shows Massachusetts Senator Ed Markey with a double-digit lead over his primary opponent Congressman Seth Moulton for the Democratic Party nomination. 

The Suffolk University-Boston Globe survey found 47-percent of voters would support  Markey if the election were held today, 30-percent would vote for Moulton and 20-percent remain undecided. 

The poll of 500 likely primary voters has a margin of error of four-point-four percent.