Under Germany's constitution, Merz needs a two-thirds majority to get the changes passed. With the support of the Greens and Social Democrats, he should succeed. Urgent motions by both the AfD and the Left to challenge next week's sessions of the outgoing parliament failed at the constitutional court on Friday, enabling the vote to go ahead.

German conservative leader Friedrich Merz reached an agreement with the Green party on a debt-funded spending package for defense and infrastructure, overcoming a key hurdle ahead of a crunch vote in parliament next week.

A new deal with the Greens could allow for as much as €1 trillion in new spending for defense and infrastructure over the next decade.