“This year’s spending to elect a president and members of Congress will hit at least $15.9 billion – putting 2024 on track to become the nation’s most expensive federal election,” CNN reports. “Helping to drive up the price tag: blistering spending by outside groups, including deep-pocketed super PACs aiding Republicans. Outside spending – largely through independent expenditures such as advertising, mailings, canvassing and other activities to boost specific candidates – has reached roughly $2.6 billion.