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.

Germany’s far-right Alternative for Germany (AfD) leader Alice Weidel is a striking contrast to the party she represents. A gay woman raising two sons with her Sri Lankan-born partner, she leads a party that opposes same-sex marriage and champions 'traditional family values'.

One in five voters in the German election favored the far right. The AfD leader’s dramatic rise terrifies many of the others.