President Obama spoke with French President Hollande today about the situation in Ukraine. The Presidents underscored that Russia will face significant additional costs if it continues its provocative and destabilizing behavior. President Obama praised the Ukrainian government's efforts to unify the country by holding free and fair presidential elections on May 25 that will lead to an inclusive constitutional reform process. The two Leaders also discussed the situation in Nigeria and the upcoming May 17 regional conference in Paris that aims to improve regional cooperation to combat the terrorist threat posed by Boko Haram.
Barack Obama, Readout of the President's Call with President Hollande of France Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/305330