Some Polymarket users made suspicious profits betting on the U.S. capture of deposed Venezuelan President Nicolás Maduro. Now, Congress wants to crack down on insider trading on prediction markets.

A bill introduced in the House of Representatives on Monday would prohibit government employees from using such platforms if they have access to relevant nonpublic information. Polymarket users wagered nearly $57 million on Maduro’s ouster, with one unknown user earning more than $400,000.

Companies like Polymarket and competitor Kalshi have faced a friendlier regulatory landscape under the Trump Administration.

Despite President Donald Trump touting the capture of Venezuelan President Nicolás Maduro as a boon for the U.S. oil industry, experts remain skeptical that U.S. control of the country’s vast oil reserves will lower prices for Americans. Venezuela’s oil production has been slow for years due to poor infrastructure and underinvestment, and oil prices could be “volatile” in the short term, according to Simon Wong, portfolio manager at Gabelli Funds. Still, major oil stocks surged Monday following the weekend military operation.

In one of the biggest changes to vaccine policy under Health and Human Services Secretary Robert F. Kennedy Jr., the CDC recommended vaccines for just 11 diseases, down from 17, in the childhood vaccination schedule. The agency narrowed its recommendations for RSV, meningococcal disease, hepatitis A and hepatitis B to children at high risk of infection—but some experts say it’s unclear how the CDC made the decision.

With the Federal Reserve having slashed........

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