A statement presented as fact, designed to mislead for political purposes, which can neither be proved to be true, nor false.
These are bogative statements:
"We can't afford to let the smoking gun be a mushroom cloud."
"Social Security will be bankrupt, long before you will ever see a dime...you can get a better return on your money, by investing in the stock market."
"Marijuana is dangerous precisely because it is so benign...it's a gateway drug."