Oil prices were little changed on Thursday, maintaining the previous session's losses on uncertainty over how U.S. President Donald Trump's proposed tariffs and energy policies would affect global economic growth and energy demand.

Oil futures headed lower Tuesday as traders weighed President Donald Trump’s vow to boost already record U.S. crude output against the threat of a steep tariff on Canadian imports and a call to replenish the Strategic Petroleum Reserve.

President Donald Trump’s repeated threats to slap steep tariffs on Canada and other friendly nations have left Toronto with some of the world’s worst-performing oil and gas stocks.

Oil prices dipped in Asian trade on Thursday, extending losses amid uncertainty over how U.S. President Donald Trump's proposed tariffs and energy policies would impact global economic growth and energy demand.

Big U.S. oil companies believe Trump's withdrawal only limits Washington's ability to influence an ongoing global energy transition and exposes them to an uneven regulatory environment.

Oil futures ended Wednesday at their lowest in almost two weeks, with U.S. benchmark prices notching a fourth straight session decline as investors weighed the potential impact of President Donald Trump’s energy policies and tariff threats.

Oil prices fell on Tuesday after U.S. President Donald Trump declared a national energy emergency on his first day in office, raising concerns of higher U.S. output in a market widely expected to be oversupplied this year.