Russian President Vladimir Putin could travel to the G20 summit in Miami in December, the Kremlin said on Friday after U.S. President Donald Trump suggested it would be very helpful if he did attend and that it had been a mistake to expel Russia from the G8. The United States has invited Russia to the annual meeting of Group of 20 countries that Washington is holding this year in Miami, and Moscow has accepted the invitation, a U.S. official familiar with the matter said on Friday. Putin has not attended a G20 summit since 2019 due to the COVID pandemic...