Washington (AFP) – A week out from the US midterm elections, Democrats stepped up their campaign offensive Wednesday, ringing alarm bells on right-wing threats to democracy and pushing President Joe Biden’s plans to tackle runaway inflation. Biden — who argues that a changing of the guard in the Democratic-controlled Congress would exacerbate price hikes and threaten entitlements — will talk up infrastructure improvements in an address from the White House. But he will pivot to democracy in the evening, berating right-wingers denying his 2020 election victory and questioning the integrity of…