Germany's anti-euro Alternative for Germany (AfD) party slipped two points to 4 percent in an opinion poll released on Wednesday after Hans-Olaf Henkel, an ally of party founder Bernd Lucke resigned last week due to an internal rift over whether to focus more on immigration. He said that the AfD would lose its way if the party's leaders did not settle their differences. It is the first time this year that the AfD, which has had a spate of successes in state elections over the past year, has fallen below the 5 percent threshold needed to enter parliament, said Forsa pollsters.