Alice Weidel, a gay woman with a Sri Lankan partner, leads Germany's far-right AfD, which opposes same-sex marriage and champions traditional values.

The leading candidate, Friedrich Merz, a conservative who has adopted many of the AfD’s hard-line positions on immigration, used his closing statement of the debate to promise his voters that he would never allow the AfD into his government. Under him, he said, the firewall would hold.

Alice Weidel, the first ever candidate of the far-right Alternative for Germany (AfD) party for the post of Chancellar, lives with her partner and two children in Switzerland.