United States (US) President Donald Trump took part Friday in an Asia-Pacific summit as he pushes on with challenges to his election loss, a day after Xi Jinping used the forum to hail China's growing economic clout.The Asia-Pacific Economic Cooperation (APEC) gathering, held online this year because of the COVID-19 pandemic, brings together 21 Pacific Rim countries, accounting for about 60 percent of global gross domestic product (GDP).Beijing has become the main driving force behind th