Sen. Lindsey Graham (R-SC) wrote a letter to the editors of The Wall Street Journal that was published on Tuesday in which he vowed that the U.S. Senate was ready to “grind” Vladimir Putin’s “war machine to a halt” if President Donald Trump is unable to broker a ceasefire between Russia and Ukraine soon. Graham, one of the most hawkish GOP senators, wrote his letter in response to a scathing Journal editorial titled, “Time for a GOP Senate Revolt on Sanctions Against Putin.” In the editorial, the Journal’s board argues for the GOP to advance Graham’s bill that would “hit...