"The difference between I.E.s and a candidate's own advertising is that the promulgators of I.E. advertising can be a lot more nasty than candidates can — and they tend to be," she said. "[Candidates] are often not willing to stoop quite as low as independent expenditure committees that are willing to say things that are patently false or really divisive or really nasty."

Source: Los Angeles Times May 27, 2018 06:56 UTC