MISSOULA, Mont. — The closer-than-expected Montana special election is destined to be picked apart for clues about how voters feel about Donald Trump’s nascent presidency. Like the record-breaking Georgia special election that will be decided next month — already the most expensive House race in history -- the Montana contest between Republican businessman Greg Gianforte and Democratic musician Rob Quist is awash in money, nearly doubling the price tag of the state’s previous most expensive campaign.