The United States will resume an anti-dumping investigation into Mexican tomatoes, the Commerce Department said on Thursday, withdrawing from a 2013 managed trade deal that U.S. growers and lawmakers say has failed. The move opens a new source of trade friction between the United States and Mexico, Commerce said it was giving the required 90-day notice before terminating the six-year-old agreement not to pursue anti-dumping cases against fresh tomato imports from Mexico.The action could lead to new duties on Mexican tomatoes, higher consumer prices and possible retaliation at a time when the two countries are still wrangling over U.S. tariffs on Mexican steel and aluminum.