BERLIN (Reuters) - Guido Westerwelle, tipped to be Germanys next foreign minister, said on Monday he wanted talks on the removal of the last remaining US nuclear weapons in Germany. The demand could be a sticking point in coalition talks between Chancellor Angela Merkels conservatives and Westerwelles Free Democrats (FDP), who between them scored a centre-right majority in Sundays election. According to unofficial estimates, the United States has around 20 nuclear weapons, deployed during the Cold War, still stationed at a base in the western town of Buechel. I think Germany can do its part to open a new chapter of disarmament. It would be smart, we want it too, to hold talks so that the last nuclear weapons that are still stationed in Germany as relics of the Cold War can be withdrawn, Westerwelle told a news conference. We argued for this before the election and we want to achieve it. We have an enormous chance and we need to seize it. The FDP campaigned earlier this year in parliament for the weapons to be removed. Merkels Christian Democrats (CDU) are against their immediate removal and argue they continue to act as a deterrent, particularly at a time when the West suspects Iran of trying to develop nuclear weapons. US President Barack Obama said in April the United States would take concrete steps toward a world without nuclear missiles, although it would maintain a safe and effective arsenal to deter any adversary. Obama this month shelved plans to place interceptor missiles in Poland and a radar complex in the Czech Republic aimed at defending against missile launches from rogue states. Under a new plan, the United States would initially deploy ships with missile interceptors, and in a second phase would field land-based defence systems.