In 1971 he resigned from the post as a protest to the party decision to support the transitional government established by a military intervention.
But that was a party decision endorsed by a party convention of several hundred people.
Still, the Congress has never reversed an important party decision, and no one expects that to happen this year.
In preparation for the party decision, the cabinet resigned on Tuesday evening.
The Congress members are selected by the party and the legislature is a compliant body that has never overturned a major party decision.
The congress is often called a rubber stamp for party decisions, and it is largely that.
Hohmann appealed the party decision in court, but his expulsion was upheld.
"Ultimately it is a party decision, so we will just have to wait."
Despite the talk about increasing the parliament's power, it essentially merely ratifies party decisions.
If this really were to happen, then party decisions, without an ideological base, would be unpredictable.