(CNN)House Russia investigators are planning to call on Brad Parscale, the digital director of President Donald Trump's campaign, as the congressional and federal probes dig into any possible connections between the Trump digital operation and Russian operatives, congressional sources said this week. {snip} Parscale told CNN Friday that he had not been contacted by any investigators -- either federal or Congressional. Senate investigators in particular have been interested in looking for a link between the prevalence of fake news that supported Trump and was pinpointed in key areas of Rust Belt states that ultimately flipped from blue to red --...