United Democratic Movement leader Bantu Holomisa told Mr Zuma there were signs his office was losing its dignity and authority.
"It is puzzling how your party outside government and its tripartite alliance partners were allowed to undermine the Cabinet’s decision on the e-tolling fiasco. Cabinet took a decision to proceed with the e-tolling system, which received the support of most political parties during the finance minister’s budget vote.
"However, after leaks to the media linking the ANC’s and Cosatu’s investment arms to the e-tolling system, and in an apparent move by tripartite alliance partners to conceal their dodgy dealings, the Cabinet’s decision on e-tolling was reversed by a few leaders who met outside government," Mr Holomisa said.
This situation was made worse when Mr Zuma and Deputy President Kgalema Motlanthe contradicted each other on the role of the ANC’s Chancellor House in getting access to government tenders.
"For instance, early this year, Mr Motlanthe said in this house it was wrong for the investment arms of the alliance partners to access government tenders. However, in the same house last week you said exactly the opposite, despite the glaring conflict of interest," Mr Holomisa said.
"Given the fact that you, Mr President, see nothing wrong with this form of institutionalised corruption, (my party) is left with no choice but to seek legal opinion - and establish whether it cannot approach courts for redress as we did when we took the floor-crossing legislation to the Constitutional Court. There is a clear conflict of interest when the party that governs is first in the line for government tenders."