Trump's plan to lower beef prices by dropping tariffs on foreign beef has split his own base, and it's bad news for American ranchers.

• Trump is letting large amounts of foreign ground beef into the US tariff-free for 90 days, saying it will be sold well below current prices.
• Beef prices hit record highs because the US cattle herd is the smallest since the 1950s, with drought and high fertilizer and diesel costs squeezing ranchers.
• Marjorie Taylor Greene, Senator Tim Sheehy, Thomas Massie, and Tommy Lahren all say the deal helps the big meat packers, not ranchers.
• The logic is shaky: cheaper beef gives ranchers less reason to grow their herds, not more.
• The revolt is a sign of Trump's weakness — with his approval near the low 30s, the right feels free to criticize him.

Outlook: Beef prices may dip briefly, but the underlying shortage and the packer monopoly stay untouched, and more Republicans are likely to break ranks.