Ukrainian author of Manafort op-ed says sought input to avoid errors

By Pavel PolityukKIEV (Reuters) - The author of an article that U.S. Special Counsel Robert Mueller believes Trump's former campaign manager Paul Manafort ghost-wrote in violation of a gag order said on Saturday he had sought input on the op-ed before publishing to avoid errors.On Friday, Mueller unveiled evidence against Manafort to convince a judge that he wrote the article to improve his public image.Manafort is facing charges as part of an investigation into accusations of Russian meddling i