Buffett Predicts Earnings Decline at Berkshire Units

Warren Buffett predicts a decline in earnings for Berkshire Hathaway, despite a strong first quarter. The conglomerate's insurance operations, like GEICO, are performing well, but other units such as energy and railroads face challenges. Buffett also discusses banking turmoil, criticizing practices at First Republic and highlighting regulatory issues. He expresses confidence that US lawmakers will avoid a debt default.

What concerns did Buffett express regarding banking practices and the recent banking turmoil?

What is Buffett's perspective on the potential for the US to default on its debt?