The USDA is not part of the political structure, so there is no such thing as a "political contribution" to anybody in that agency. Any "contribution" would be considered a BRIBE. And ADM would have to bribe all the folks involved in the data collection process, down to below the level of county agent, and trust that NONE of them would "squeal". We're talking about the validity of the statistics gathered by the USDA---not a vote by Congress.
The USDA is not part of the political structure, so there is no such thing as a “political contribution” to anybody in that agency.
Of course, but it’s very naive to think that the USDA is not influenced by Congressmen and Senators that take contributions as their main business. There is no part of government that is apolitical.