The G20 summit will be a diplomatic test for Brazilian President Luiz Inacio Lula da Silva, who has boosted Brazil's global standing but drawn criticism for his positions on Ukraine and Gaza. Lula's biggest diplomatic success has been his leadership in the fight against climate change by overseeing a slowdown in deforestation of the Brazilian Amazon. He has also sought to be a bridge-builder between the West and the Global South, strengthening Brazil's ties with China. However, Lula has faced criticism for his handling of global affairs, particularly regarding Ukraine and Russia, as well as his stance on Israel's war against Hamas. Venezuela is another weak spot in Lula's diplomacy, as he has refused to recognize President Nicolas Maduro's claim to have won reelection.