By Diane Bartz WASHINGTON (Reuters) – Florida and other U.S. states will join the Justice Department in seeking to determine if Comcasts plan to merge with Time Warner Cable is legal under U.S. antitrust law, Florida said in a statement to Reuters. We are part of a multistate group reviewing the proposed transaction along with the U.S. DOJ (Justice Department) Antitrust Division, the Florida state attorney generals office said in an emailed statement. Separately, Indiana officials were also looking at the deal to determine the potential impact in Indiana. Erin Reece, a spokeswoman for the Indiana attorney generals office, did not indicate if Indiana was part of the multistate group.