In 2018，the ruling center-right coalition Cambiemos occupied the dominant position of the Argentine political arena. The opposition was still in divisions，and it was difficult to unite to compete with the ruling coalition. However，the economic recession led to a sharp decline in government’s approval ratings，which increased the uncertainty of the presidential election in 2019. Because of the currency crisis，the Argentine economy contracted by 2.6% in 2018. To overcome the crisis，the government reached a US 56.3bn lending agreement with the IMF，but had to implement strict fiscal austerity policies. The deterioration of the economic situation and the high level of inflation seriously affected the improvement of social indicators and increased the dissatisfaction of people. Affected by financial difficulties，real wages and social welfare levels declined. The government made great achievements in diplomacy. The successful holding of the G20 summit became the most important diplomatic victory after Mr.Macri took office.