President Donald Trump said Tuesday the United States was ready for war against the drug cartels, volunteering American forces to Mexico for the job. “This is the time for Mexico, with the help of the United States, to wage WAR on the drug cartels and wipe them off the face of the earth,†he wrote on Twitter.Trump’s remarks were sparked by news of American citizens getting slaughtered in Mexico, after getting caught in the crossfire of a cartel battle in the border state of Sonora. Relatives have said at least nine U.S. citizens were killed including six children of which two were...