The battle lines over interest rates just got sharper — and the data isn't making it any easier. Cleveland Fed President Beth Hammack told CNBC Tuesday that inflation remains "still too high" and the Fed "may need to consider rate hikes," pointing to a labor market at full employment and solid growth. Hours later, White House economic adviser Kevin Hassett fired back, calling any rate increase a "mistake" and projecting US GDP growth of 4% in the second half of...