France's President Francois Hollande (L) meets with Russia's President Vladimir Putin (R) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

Russia's President Vladimir Putin looks on during a meeting with France's President Francois Hollande (not pictured) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

French President Francois Hollande (R) and Russian President Vladimir Putin (L) during the G20 Leaders Summit in Hangzhou, in China's eastern Zhejiang province on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

German Vice Chancellor, Economy and Energy Minister Sigmar Gabriel of the Social Democrate's party speaks as exit polls were announced during an election results party on September 4, 2016 in Berlin. Germany's anti-migrant populists AfD recorded strong results, around 21 percent at state elections, unseating Chancellor Angela Merkel's party from second place, exit polls showed. The CDU garnered around 19 percent of the votes, its worst showing ever in the north-eastern state, while the Social Democrats maintained top place with around 30 percent. / AFP PHOTO / dpa / Britta Pedersen / Germany OUTBRITTA PEDERSEN/AFP/Getty Images

(L to R) Chairman of the Green Party Cem Ozdemir,chairman of the Left Party Dietmar Bartsch and economy minister of the state of Mecklenburg-Western Vorpommern Harry Glawe of the Christian Democratic Union (CDU) attend a TV discussion in Schwerin, northern Germany, on September 4, 2016 after the announcement of the exit polls. Germany's anti-migrant populists made a strong showing at Sunday's state polls in Mecklenburg-Western Vorpommern, scoring ahead of Chancellor Angela Merkel's party as voters punish the German leader over her liberal refugee policy. / AFP PHOTO / POOL / Christian CharisiusCHRISTIAN CHARISIUS/AFP/Getty Images

Berlin's Mayor Michael Mueller of the Social Democrats (SPD) (L) and German Vice Chancellor, Economy and Energy Minister Sigmar Gabriel speak as exit polls were announced on TV during an election results party on September 4, 2016 in Berlin. Germany's anti-migrant populists AfD recorded strong results, around 21 percent at state elections, unseating Chancellor Angela Merkel's party from second place, exit polls showed. The CDU garnered around 19 percent of the votes, its worst showing ever in the north-eastern state, while the Social Democrats maintained top place with around 30 percent. / AFP PHOTO / dpa / Britta Pedersen / Germany OUTBRITTA PEDERSEN/AFP/Getty Images

TOPSHOT - Brazil's President Michel Temer holds a press conference on the sidelines of the G20 Leaders Summit in Hangzhou, in China's eastern Zhejiang province on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / GREG BAKERGREG BAKER/AFP/Getty Images

French President Francois Hollande (L) meets with Russian President Vladimir Putin (R) during the G20 Leaders Summit in Hangzhou, in China's eastern Zhejiang province on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images