The two special election primaries for Congress in Ohio today offer windows into each party a little more than six months into President Joe Biden's tenure \u2014 and Donald Trump's post-presidency.\nAnd, for a while now the hottest ticket in town has been an invitation to Sen. Joe Manchin's houseboat. He\u2019s entertained top White House officials like Ron Klain, but mostly he\u2019s used the boat to bring together bipartisan groups of senators.\nBut this week Manchin\u2019s ongoing attempts to lubricate the gears of Congress with bonhomie aboard Almost Heaven, as the vessel is called, took a frightening turn when a vaccinated Sen. Lindsey Graham, one of his Saturday guests, tested positive for Covid-19.\nRaghu Manavalan is the host of POLITICO's Playbook.Jenny Ament is the senior producer for POLITICO Audio.\xa0Irene Noguchi is the executive producer of POLITICO Audio.