Rep. Mark Sanford, a fiscal conservative from South Carolina, said the farm aid was "destructive" and "doubling down on bad policy."

He added that it calls into question what Republicans stand for these days.

"This trade-and-aid issue has real implications in the branding of the Republican Party as to what it does and doesn’t stand for," he told CNN.

Sanford said it's likely that other industries would also be seeking help.

“The logical questions is, if it’s good enough for the farm sector, why wouldn’t it be for other sectors?" he said. "I think there are going to be a lot of ‘me too’ questions that are going to be raised in light of this package."

From a fiscal point of view, he described the situation as a "nightmare."

“It’s a nightmare, because not only are you increasing taxes — because a tariff is a tax — now you’re doubling down on harmful taxpayer effect in that not only are you increasing taxes, you’re increasing spending as well with the aid package.”

“What I hear from farmers is they’d rather have trade than aid," he added.