The boomerang from the Democratic Party’s failed attempt to connect Donald Trump to Russia’s 2016 election meddling is picking up speed, and its flight path crosses right through Moscow’s pesky neighbor, Ukraine. That is where there is growing evidence a foreign power was asked, and in some cases tried, to help Hillary Clinton. In its most detailed account yet, Ukraine’s embassy in Washington says a Democratic National Committee insider during the 2016 election solicited dirt on Donald Trump’s campaign chairman and even tried to enlist the country's president to help. In written answers to questions, Ambassador Valeriy Chaly's office says...