By Alden Bentley, Harry Robertson and Wayne Cole NEW YORK/LONDON/SYDNEY (Reuters) -Wall Street struggled for traction on Monday, ending mixed after slumping last week, while German election results buoyed German shares and Europe's single currency as investors waited for midweek results from artificial intelligence chip leader Nvidia.

Germany faces its second change of leader in less than four years after the head of the center-right opposition won Sunday’s election.

Germany’s economy is stalled and its politics fractured. But it sees an opening for a new chancellor to lead Europe’s response to a changing America.