wolf blitzer in the situation room. thanks very much for watching erin burnett outfront starts right now outfront next, trump demands of drug tests before the debate, as we re getting new report into outfront this hour about a possible shift in strategy for biden tonight plus the most expensive house primary race in american history, with everyone from aoc to hillary clinton weighing in, who is favored to win in this crucial race tomorrow. and will take you to the southern border tonight. we re a small community straddles both sides of a dangerous part of the border. what they re witnessing every day and what they fear is still to come out front good evening. i m erin burnett outfront tonight demanding a drug test. so for president trump now says president biden should be tested for drugs you saying this three days before the presidential debate right here on cnn and all caps, trump tonight writing online quote, drug tests for cookie joe biden, three exclamation point