berlin leader germany social democrats spd pledge u.s. nuclear weapons withdraw german territory odds defeat angela merkel become chancellor next month address campaign rally trier late tuesday spd leader martin schulz also say unlike merkel would resist demand u.s. president donald trump nato members increase defense spend trump want nuclear armament schulz say apparently try differentiate party merkel hawkish christian democratic union cdu chancellor commit germany nuclear weapons station withdraw country say 20 u.s. nuclear warheads think station military base buechel western germany accord unofficial estimate u.s. embassy berlin say comment nuclear weapons germany take advantage trump extreme unpopularity germany schulz also say would use money merkel earmark increase military spend purpose money central question election say refer 30 billion-euro tax surplus trump demand percent gdp 30 billion euros go military spend merkel agree without ask german citizens germany nato members already pledge raise defense spend percent gross domestic product trump elect increase spend militaries reach percent goal germany one recent poll show schulz party poll around 24 percent 14 percentage point behind merkel expect boom economy low unemployment carry fourth term sept. 24 elections however germans historically wary use military force since world war two schulz message may resonate among spd core voters 12 years office merkel become increasingly confident global stage push germany become militarily self-reliant partly response trump hint might abandon nato ally spend defense early year merkel say time germany could rely others defend extent past germany 's schulz say would demand u.s. withdraw nuclear arm