U.S. Congressional stock trading continues to remain a hot topic among the trading community, with many traders seeking to replicate success from politicians who potentially trade using insider information. Recently, Senator Markwayne Mullin from Oklahoma made headlines about his stock purchase, which seems suspiciously related to insider knowledge. On July 12, Senator Mullin reported purchasing Parker-Hannifin (NYSE: PH) stock, worth up to $50,000, and has risen as much as 6% since the June 12 purchase dat ...