Germany's parliament is expected to vote Friday on an opposition bill calling for tougher rules on migration that could become the first legislation to pass thanks to a far-right party — adding to a controversy about the attitude of the front-runner in Germany's upcoming election toward the far right.

Opposition leader Friedrich Merz has put demands for a more restrictive approach to migration at the center of his campaign for the Feb. 23 election since a deadly knife attack last week by a rejected asylum-seeker.