U.S. Senator Chuck Grassley told reporters Wednesday that Mexico's President Claudia Sheinbaum is "making a real effort to get along with the Trump administration," a notably warm assessment from an Iowa Republican at a moment when U.S. agriculture is watching the USMCA review for signs of disruption.

The comments came during a media call, and they place one of the Senate's most experienced farm-state voices firmly in the cooperative-engagement camp as the Trump administration negotiates with Mexican counterparts. Grassley has served for decades on Senate committees dealing with agriculture, finance and trade — a résumé that gives him standing on both production policy and tariff matters.

"She is making a real effort to get along with the Trump administration," Grassley said, framing Sheinbaum as willing to come to the table throughout the USMCA process.

Why Grassley's posture matters for the Corn Belt

Mexico ranks as the top or near-top destination for several major U.S. farm commodities. Corn, pork, dairy and soybeans all flow south of the border under the duty-free framework that USMCA formalized in 2020, and any movement on tariffs or non-tariff barriers reaches elevators, feedlots and processors from Iowa to Wisconsin. When a senior senator from a heavy-export state signals satisfaction with the tone of talks, that cue typically filters into basis expectations at country elevators and into forward sales decisions by co-op merchandisers.

Grassley's audience on Wednesday was implicitly Midwestern. His track record — including past clashes with administrations of both parties over ethanol, E15 and country-of-origin labeling — makes him a credible reader of negotiating posture. The fact that he described Sheinbaum in cooperative terms rather than issuing warnings is itself a departure from the more confrontational framing that has colored some trade commentary in recent months.

Will cooperation translate into policy outcomes?

Sheinbaum's willingness to engage does not resolve the policy disagreements still on the table between Washington and Mexico City. Negotiators have been working through disputes that include Mexican domestic policy on energy, agricultural biotechnology approvals and produce import rules — areas where the two governments have historically clashed. The USMCA itself includes a formal review clause scheduled for 2026, with provisions that could reshape access for U.S. exporters depending on how the renegotiation plays out.

Grassley did not address those specific frictions in his Wednesday remarks. His restraint, though, carries weight: he is not a member of the negotiating team, but his public posture helps shape how farmer-leaders, co-op boards and input manufacturers interpret the temperature in Washington.

What did the senator leave unsaid?

Notably absent from Grassley's comments was any threat to walk away from the framework, any specific tariff red line and any public criticism of Sheinbaum by name. That restraint is unusual from a lawmaker who has not hesitated to criticize trading partners in past administrations when he viewed their behavior as harmful to U.S. producers. The silence on threats is itself a signal.

What's the next checkpoint?

The next concrete test of the cooperative tone Grassley described will come in any scheduled meeting between U.S. Trade Representative staff and Mexico's Economy Ministry, or in any formal joint communiqué from the two governments. Until then, exporters and grower-leaders will continue to read statements like Wednesday's for cues on whether the negotiating environment is hardening or holding.

For Midwestern merchandisers watching basis moves tied to trade headlines, Grassley's assessment offers at least a near-term floor under the assumption that USMCA access remains intact — a posture that supports forward sales of U.S. corn and pork heading into the spring demand window in Mexico.