That has drawn the ire of business groups but has the strong support of trade unions.
A coalition of business groups is expected to call for his removal from office, through resignation or impeachment.
By contrast, the reaction of business groups to the choice of Ms. Solis ranged from tactful displeasure to sharp dismay.
The legislation, a top priority of business groups, saves companies substantial amounts on their pension plans by changing the way their required contributions are calculated.
Mr. Chávez's opponents, who include a diverse coalition of business groups and labor unions, have demanded that he resign immediately and schedule elections as early as February.
And with the support of business groups and prominent philanthropists like Susan Buffett, the daughter of Warren Buffett, it may enter the national agenda.
The president also replaced Lee Yong Keun, the chairman of the Financial Supervisory Commission, which oversees the restructuring of business groups and banks.
A coalition of business groups is lobbying Congress to raise the ceiling on these visas to 195,000 a year from 115,000.
As Democrats considered the potential parliamentary maneuvers, a coalition of business groups announced Tuesday that it was beginning a television advertising campaign to stop the health care legislation.
An odd coalition of business groups, trade unions and civil-rights organisations is pushing hard for reform under the umbrella of the Alliance for Immigration Reform 2007.
But a range of business groups have sided with the White House, supporting the expansion as a necessary step alongside passage of the trade deals.
