very little is known about her...obama most likely knows the most, he has worked with her and obviously interviewed her for the nomination. i have little trust of obama and this pick could actually be a bold move on his part. if virtually nothing is known about her views and she sails through the confirmation hearings giving as 'much' (read little) at roberts, she could be a far left pick....we won't truly know her views until she takes the bench and makes decisions....
i also don't see expanding executive power to be solely a right leaning issue, the left loves this power as well....so, imo, that does not make me believe she leans left or right because of her stance on executive power