By Andrew Galbraith SHANGHAI (Reuters) – Crude oil prices jumped again on Wednesday while Asian stocks struggled for footing as investors assessed the impact of the worsening conflict in Ukraine and a new U.S. ban on Russian oil. The price of a barrel of crude, already on the march higher in January on supply worries and expectations of a strengthening global economic recovery, has rocketed upward since Russia launched its invasion of Ukraine on Feb. 24. Oil is now roughly double its early December low. Risking even higher U.S. fuel prices that could curb economic growth, President Joe Biden o…