The issues on the table when Trump and Putin meet

Washington has stood by Ukraine's pro-Western leaders in their stand-off with Russia. That has included the United States providing Kiev with hundreds of millions of dollars worth of military aid. Helsinki would be a triumph for Putin if he persuaded Trump to drop that military aid. Ukrainian officials say they have assurances from Trump aides he won't do this, but acknowledge anything can happen when Trump and Putin are in a room together. In return, the Russian leader could make concessions over eastern Ukraine, where pro-Moscow separatists control swathes of territory. Diplomats say there is a deal to be done allowing armed international peacekeepers to patrol the area. However, Putin will not contemplate any concessions over Crimea.