US President Donald Trump has defended his decision to waive a package of Russian sanctions, arguing he doesn't want to drive Russia away from the bargaining table. President Trump has also waged a new attack against Ukrainian President Volodymyr Zelenskyy, accusing the Ukrainian president of not wanting the war with Russia to end.

USSC Director of Research Jared Mondschein spoke with ABC News, saying diesel prices are a key policy issue in the US midterm elections, and that is driving some of Donald Trump's positioning and decision-making on the conflict between Russia and Ukraine.