US midterm elections are normally about voters punishing the party in the White House, which usually loses seats in the House and Senate, and often control of Congress. But not the one this November.

For Jon Lieber, Eurasia Group's US managing director, the big threat to American democracy in this year's midterms is that the Republican Party — now controlled by president Donald Trump — could win gubernatorial and other state-level races in key swing states with candidates who support Trump's bogus claim that the 2020 presidential election was stolen from him.