As Medicare officials review evidence about Biogen’s (NSDQ:BIIB) Aduhelm (aducanumab) to determine if and how it will cover the drug, two high-level House Democrats are asking Biogen about its dealings with FDA.  Yesterday, Carolyn Maloney (D-N.Y.) and Frank Pallone, Jr. (D-N.J.) sent a letter to Biogen CEO Michel Vounatsos asking for details about the company’s communications with…