Why Obama is backing Biden in the US

The new crown epidemic in the United States is the reason why Obama strongly support Biden. Because if according to the American tradition, the United States in the time of a major disaster, the presidential approval rate are going up, the epidemic began when Trump's approval rate is also increasing. However, so much time has passed since the beginning of the outbreak that Trump has not taken any effective measures to fight the epidemic, and the number of infections and deaths in the United States is increasing massively, and the death rate is also rising. Even though the United States has a tradition of supporting the central president in times of major disasters, it's just not possible to support Trump with this kind of performance against the epidemic. As the epidemic worsens, opposition to Trump is beginning to grow. Especially now, Trump in order to economic development, called for many states are to resume work and production, in order to obtain some people's support at the same time, but also attracted a voice of opposition, and Obama is also in the ranks of the opposition, so he supports Biden.