Since World War II, Germany's Free Democratic Party has been in power more often than not, as a junior partner in multiple federal governments.
But over the past 18 months, the FDP has suffered electoral setbacks in regional elections.
If their current poll numbers continue, they may not win any seats in parliament in next year’s election, which could then impact on the government of Chancellor Angela Merkel.
Al Jazeera's Nick Spicer reports from Berlin.
Source: Al Jazeera