CSU leader Markus Söder received a slight damper when he was re-elected as party leader.
Söder received 87.6 percent of the delegates' votes at the CSU party congress in Nuremberg on Friday, less than when he was elected two years ago.
Söder still spoke of a great result.
At the party congress, Söder called for a committee of inquiry into the latest investigations into the federal anti-money laundering unit.
He referred to the recent investigation, which gave him the impression that the finance minister was almost offended that the prosecutor was doing its job.
"Countless questions, no answers, I think this whole complex deserves to be examined in parliament as well as the toll and Wirecard."
Söder also warned again against a left slide in the upcoming federal election.
For the first time, a red-red-green government could come to power, he says at the CSU party conference in Nuremberg.
"We don't want a left slide in Germany." At the same time, he affirmed the Union's will to power: "I don't feel like the opposition."
In his speech, the CSU chairman demonstratively backed the CDU chairman Armin Laschet, with whom he had once fought for the Union's candidacy for chancellor. It was met with applause lasting several minutes.