Excerpt:
The anti-immigrant Alternative for Germany (AfD) looks set to turn further right after its co-leader, who has struck a more moderate tone of late, suffered a defeat when delegates refused to discuss her motion to shift the party into the "mainstream".
Support for the party, which attacks Chancellor Angela Merkel for having allowed more than a million migrants into Germany in the last two years, has tumbled in recent months after reaching the mid-teens in opinion polls last year.
Originally founded as an anti-euro party in 2013, the AfD is expected to enter the national parliament for the first time after September's election but is treated as a pariah by established political parties, which refuse to work with it. Its congress drew thousands of protesters to Cologne on Saturday.