Vice-president outlines her vision for America at Washington DC event; former Trump and Bush officials among more than 100 backing Harris

The US is still not prepared for inevitable Russian attacks on its elections, the former special counsel Robert Mueller, who investigated Russian interference in 2016 and links between Donald Trump and Moscow, warns in a new book.

“It is … evident that Americans have not learned the lessons of Russia’s attack on our democracy in 2016,” Mueller writes in a preface to Interference: The Inside Story of Trump, Russia and the Mueller Investigation by Aaron Zebley, James Quarles and Andrew Goldstein, prosecutors who worked for Mueller from 2017 to 2019.

As we detailed in our report, the evidence was clear that the Russian government engaged in multiple, systematic attacks designed to undermine our democracy and favor one candidate over the other.”