The House Republican impeachment inquiry into president Joe Biden fell flat once again in a hearing that wasn’t even carried live on Fox News, and MSNBC’s Joe Scarborough identified the major mistake GOP lawmakers made. Democrats undercut the credibility of another GOP witness with troubling ties to Russia, while former Rudy Giuliani associate and convicted fraudster Lev Parnas testified that the allegations that formed the basis of the inquiry were manufactured Russian intelligence officials, and the “Morning Joe” host said Republicans should have let the case play out as a whisper campaign i…