After a failed plan to gather support for Anwar Ibrahim, a group of Umno MPs may use next month's budget to force snap polls.
A staunch supporter warns DAP of swift retribution at the ballot box if it chooses to work with Umno.
They also question the PKR leader's definition of a 'formidable' majority.
Police are investigating several reports by Umno MPs denying claims that they would back Anwar.
Umno leaders say they are committed to the decision for party MPs to only switch political alliances en bloc.