Draft legislation before a key Senate panel would assign the Missile Defense Agency responsibility for developing the Space Sensor Layer, bucking a Defense Department gambit to fold the project into the new Space Development Agency as part of an effort to develop a new multimission satellite constellation. Sens. Dan Sullivan (R-AK) and Joe Manchin (D-WV) have proposed legislation that could be adopted into the Senate Armed Services Committee's fiscal year 2020 defense policy bill that would establish in law MDA's...