WASHINGTON — U.S. President Donald Trump said Tuesday he was considering renaming Lake Ontario as "Lake America" as his trade war with Canada escalated. The threat — which Trump backed up with a map featuring the new name — mirrored his move to rename the Gulf of Mexico as the Gulf of America last year. Trump stepped up his rhetoric as Canada announced a volley of tit-for-tat tariffs on U.S. goods after trade talks between the historically close allies broke down on Friday. "The United States is giving serious consideration to changing the name of Lake Ontario to Lake America in that we don't expect to be doing much business with Ontario any longer," Trump said on his Truth Social network. Lake Ontario is one of the five Great Lakes located on the border between Canada and the United States. It shares a name with the Canadian province of Ontario, which borders the lake along with the U.S. state of New York. Toronto, Canada's largest city, sits on the northwestern shore of the lake. Trump later posted a map with the words "Lake Ontario" crossed out and replaced with "Lake America" in