Twice as many high school students used nicotine-tinged electronic cigarettes this year compared with last year, an unprecedented jump in a large annual survey of teen smoking, drinking and drug use. It was the largest single-year increase in the survey's 44-year history, far surpassing a mid-1970s surge in marijuana smoking. [...] That survey also found a dramatic rise in vaping among children and prompted federal regulators to press for measures that make it harder for kids to get them.