Text: Once you exclude fringe elements on both sides--Ralph Nader and Pat Buchanan, basically--both Democrats and Republicans accept the reality of NAFTA and the WTO even as they argue about whether these bodies should include environmental and labor laws, a la the EU.
Entailment: Ralph Nader and Pat Buchanan represent democrats and republicans with extreme views.
Contradiction: Ralph Nader and Pat Buchanan are planning to run on the same ticket in 2018.