A key figure in Hunter Biden's early relationship with CEFC China Energy, Bobulinski claims he met with Joe Biden and discussed business, contradicting the Bidens' longstanding assertions.
"Those same liberal outlets that disparaged our investigation now report that Hunter Biden's financial deals in China raise counterintelligence concerns," Grassley said during his Thursday remarks.
Hunter Biden was also involved in deals with foreign nationals from China, Kazakhstan, Ukraine and Romania, the timeline shows.
Biden on Sunday night pardoned his son Hunter on gun and tax charges, despite promising not to make such a move.
Bobulinski worked with Hunter Biden on a joint venture with CEFC China Energy in 2017 but was cut out of the deal later on.
The "relationships created counterintelligence and extortion concerns," Grassley and Johnson warn.
Republicans said the Sunday night pardon of Hunter Biden exposed a continuing dual system of justice.
Selective revenge: Hunter Biden dropped a lawsuit against a former Trump aide because he told the court he could not afford it. Biden is continuing to press his lawsuit against the IRS whistleblowers who put a public spotlight on the DOJ's mishandling of the criminal case against him.
The documentary's six chapters each dissect a different deal the Bidens made with the Chinese government — including one in which China planned to invest more than $1 billion in Bohai Harvest RST (BHR), an investment fund partly owned and directed by Hunter Biden.