(Reuters) -Tesla is headed for another year of shrinking sales after it posted a second straight drop in quarterly deliveries, dragged down by CEO Elon Musk's right-wing political stances and an aging vehicle line-up that has turned off some buyers. The automaker now needs to deliver over one million vehicles in the typically strong second half to avoid another annual sales decline — a task that some analysts say could prove difficult due to tariff-driven economic uncertainty and threats to phase out key EV incentives under the Trump administration's sweeping tax bill, including the $7,500 credit on new sales and leases. It reported on Wednesday that deliveries fell 13.5% in the second quarter, missing analysts' expectations even after Musk said in April that sales had turned a corner.