JTA — Massachusetts incumbent and Israel critic Sen. Ed Markey, 80, is expected to handily fend off the more moderate 47-year-old Rep. Seth Moulton on Tuesday, in the state’s Democratic Senate primary.

Although polls project that Markey, a progressive stalwart, will retain his seat, this race began as a neck-and-neck battle between the old and new guard. Yet in contrast to many recent primaries, the junior candidate in this case is the more centrist of the two.

If current numbers hold, Markey could go from leading Moulton by just single digits two months ago to trouncing him by 30 percentage points. The incumbent recently “opened a large lead,” with the University of New Hampshire’s Bay State Poll projecting a 63% to 28% victory. That’s a dramatic shift from June, when the survey estimated a 41% to 35% margin. Since then, according to Bay State, Moulton lost moderate support while Markey consolidated socialist and progressive backing.

The University of Massachusetts Amherst offered similar predictions, placing Markey far ahead of his competitor, 60% to 32%. Emerson College Polling, meanwhile, showed a comparable lead for Markey, with the incumbent at 60% and Moulton at 33%.

“At the end of the day, one of the reasons for Moulton’s flame-out is that he had no case to make other than ‘I’m younger than Ed Markey,’” Jeff Robbins, a Boston-based attorney and former Senate investigative counsel, told the Jewish Telegraphic Agency.