The fast-moving developments in Trump's near-back-to-back summits with the heads of Russia, Ukraine and European powers have highlighted a pair of repeated sticking points.

U.S. President Donald Trump met with Ukrainian President Volodymyr Zelenskyy on August 18 in the Oval Office, alongside European leaders from Germany, France, and the United Kingdom. The meeting followed Trump’s August 15 summit with Russian President Vladimir Putin in Anchorage, Alaska.

Russian troops currently control about 20% of Ukrainian territory, but the Ukrainian constitution forbids giving up territory or trading land.

The dollar traded steady against a basket of currencies as investors assessed the latest efforts to resolve the Ukraine-Russia conflict.