When Stefany Shaheen filed her paperwork to formally enter the NH-01 Democratic primary, she made it clear that healthcare was her top issue. When NHJournal asked if she supports a single-payer healthcare system like Medicare for All, which has the backing of most of her fellow Democrats, Shaheen was less clear. “I support every option we need to fix this broken healthcare system, but that (single payer) is not where we — we know we have to deli…