U.S. Treasury Secretary Scott Bessent's upcoming prime-time speech at the Republican midterm convention in Dallas on Wednesday marks the first time in 50 years a sitting Treasury secretary will speak at a national political convention. This move is raising concerns about how his political role could affect market confidence in his management of U.S. debt markets. The speech comes as the Treasury Department announced a $6 billion long-term debt buyback this week, with 10-year Treasury yields rising to 4.84% mid-afternoon Wednesday, higher than any point of Trump's term.