No. No President, indeed, no politician is subject to drug testing because it would not be legal.Drug testing was introduced in the United States in Armed Services after a number of tragic accidents were found to be the result of drugs and/or alcohol abuse.Later in the 1980u2019s in the wake of a horrible train wreck where it was found that the train engineers were using drugs and alcohol and that contributed to the crash. A number of college students were killed and their parents pressured Congress to introduce drug testing in public transportation systems including rail, air, bus and ferry that received public funding.Unions filed suit against the legislation citing that it was an invasion of a personu2019s right to privacy under the 4th Amendment to the Constitution. The suit was fast-tracked to the Supreme Court who ruled on the basis of established law which said jockeys in horse racing could be tested on the basis that the race fans who wagered, had a right to know that the jockey was not under the influence. The natural logic was, that the public deserved to know that their train engineer, pilot, bus or ferry operator was not under the influence.Thus, public safety in the measure of who gets tested and who does not. The President (and the Congress or any level of government) do not, contrary to the Media conclusions, directly affect the safety of U.S. Citizens by the actions they take on a day-to-day basis.Initially, drug tests were highly controversial because the testing labs were not technically accurate and produced a percentage of u201cfalse-positivesu201d which ruined a number of soldieru2019s careers. Later, regulations requiring uniform and high standards were implement by government legislation and, any lab that produced a false-positive would lose their license.There are still accidents with public transportation that are caused by drug and/or alcohol abuse but the percentage has been reduced drastically.