A Wall Street Journal investigation has found that little-known Chinese firms are orchestrating pump-and-dump schemes on U.S. stock exchanges, siphoning off tens of millions of dollars from American investors. Traders and investigators told the newspaper that regulators struggle to collect evidence from China even though the companies offer shares to U.S. buyers. The Justice Department has made disrupting these scams a priority under the Trump administration’s white-collar crime enforcement program and has already begun intervening in several cases, according to people familiar with the effort. On Capitol Hill, the House Select Committee on the Chinese Communist Party urged the Securities and Exchange Commission to begin delisting Chinese issuers that resist U.S. oversight. Committee Chairman Rep. John Moolenaar separately pressed the Defense Department to tighten vetting of contractors, while lawmakers introduced the bipartisan Advanced AI Security Readiness Act to shield American innovation from foreign espionage. The Senate Judiciary Committee amplified the urgency on June 17, convening a hearing titled “Scammers Exposed: Protecting Older Americans from Transnational Crime Networks” to examine how international fraud rings, increasingly assisted by artificial intelligence, target U.S. seniors. Senators from both parties said additional legislative and enforcement tools are needed to combat the growing wave of cross-border financial crimes.