Mohamsson, who is also Minister of Education and Integration, took office as party leader of the Liberals four months ago, but is still unknown to about a third of voters.
She represents a party that has big problems with its popularity, that's the basis, says Ekot's domestic political commentator Fredrik Furtenbach.
The highest level of trust is in S leader Magdalena Andersson with 52 percent. However, she has lost some ground compared to the corresponding survey in May.
The Green Party's spokesperson Daniel Helldén and the Left Party's party leader Nooshi Dadgostar also back down in confidence.
Things are going better for KD leader Ebba Busch and SD's Jimmie Åkesson, whose confidence has risen by several percentage points.
Prime Minister Ulf Kristersson (M) has the second highest level of trust with 45 percent.
The Center Party's outgoing party leader Anna-Karin Hatt receives 19 percent in the survey.
