The chief executive of Carvana, which sells used cars online, said President Trump’s tariffs could help his company by increasing demand for its vehicles.

The automaker’s somber forecast for the fiscal year underscored how quickly fortunes have turned for many companies reckoning with President Trump’s tariffs.

Tariffs on imported parts will have a broad impact because all vehicles use components made abroad.

The planned concessions to give automakers more time to relocate production to the United States would still leave substantial tariffs on imported cars and car parts.

After nearly a decade in power, the Liberal Party seemed destined to be swept out on a wave of anti-incumbency sentiment. Then events took a surprising turn.

President Trump has created what could be called a Luddite trap for the American auto industry: His tariffs aim to protect it from foreign competition, while his domestic policies threaten to cut it off from innovation. Together, they risk leaving U …