Trump called Ukraine "a place we're all very much involved in" and said it was a great "honor to be with President Poroshenko" in the Oval Office Tuesday as he welcomed the president to the White House.

• Context: This comes in advance of Trump's meeting with Russian President Vladimir Putin at the G20 meeting next month, and today Poroshenko tweeted he is "grateful" for America's intention to stand by Ukraine.
• U.S. role in Ukraine: Trump met with Ukrainian foreign minister Pavlo Klimkin in May, who said Trump and Poroshenko would meet once conversations about the U.S.'s role in Ukraine's stalled peace progress were done, Deutsche Welle reports.
• The intrigue: This meeting was actually between Trump and his National Security Advisor H.R. McMaster — Poroshenko and VP Pence just dropped by.