We're about a month away from the April 30 primaries in the Massachusetts special Senate election, and Rep. Ed Markey continues to hold a significant-but-not-insurmountable lead over Rep. Stephen Lynch on the Democratic side.

A new WBUR poll from the MassINC Polling Group shows Markey leading Lynch 35 percent to 24 percent, with another 30 percent undecided.

Markey has the support of the Democratic establishment and has a big financial advantage over Lynch. But it's worth noting that Lynch's personal favorable numbers are slightly better than Markey's, at 37 percent favorable and 12 percent unfavorable, compared to a 32-23 split for Markey.

On the GOP side, former U.S. attorney Michael Sullivan has asserted himself as the early front-runner and stands at 28 percent, compared to 10 percent for state Rep. Dan Winslow and 8 percent for former Navy SEAL Gabriel Gomez.

Democrats lead in the general election by at least 17 points no matter who the nominees are, though it's worth noting that the GOP candidates remain less well-known than the Democratic candidates.