BERLIN — Germany’s chancellor-in-waiting in a fiery Bundestag debate Thursday urged Green lawmakers to pass constitutional amendments that would unleash up to €1 trillion in new spending to bolster the country’s military and invest in its economy.

Merz's conservatives and the center-left Social Democrats – in talks to form a coalition after February's general election – unveiled the plans for vast extra outlays last week and are now racing to push them through the current legislation.