Elaine DiMasi has officially hung up her lab coat — forgoing her position as a physicist at Brookhaven National Laboratory to jump into the 2018 race for the congressional seat in New York’s 1st District. The 1st District, comprised by much of Suffolk County, has been held by incumbent Rep. Lee Zeldin (R-NY). Cook Political Report puts Zeldin in a safe spot, with the 1st District likely remaining Republican in next year’s midterm. The 48-year-old Ronkonkoma resident joins a small enclave of Democratic candidates looking to take on Zeldin in a seat that looks hard to beat. But after almost a year of planning, DiMasi is done wading and is ready to take the plunge. “Are they going to say wow that’s great, a different kind of candidate that can get out the vote or are they going to say I want that seat?” DiMasi said. If successful, DiMasi would…