Republicans’ blocking of the Capitol commission shows how deep the rot is

Analysis: one of America's two major parties now falls outside the democratic mainstream but are Democrats taking the existential threat seriously?

The question now is not so much whether the Republican party can be saved any time in the foreseeable future. It is what Joe Biden and the Democrats should do when faced with a party determined to subvert democracy through any means necessary, including violence.

On Friday Republicans in the Senate torpedoed an effort to create a bipartisan commission to investigate the deadly insurrection by Donald Trump's supporters at the US Capitol on 6 January, deploying the procedural move known as the filibuster to stop it even being debated.