Explanation:

After the formation of Haryana in November 1966, Bhagwat Dayal Sharma became Haryana's first Chief Minister, and Birendra Singh was elected the first speaker of the Haryana assembly which was a spin-off from the Punjab Assembly. The first ever poll to Haryana Vidhan Sabha was held in March 1967. Birender Singh was elected a member of the Haryana Legislative Assembly from the Pataudi assembly constituency as Congress Party's candidate. However, he established the Vishal Haryana Party immediately by defecting from Congress with many MLAs. He was appointed Chief Minister of Haryana on 24 March 1967, replacing Bhagwat Dayal Sharma with his newly formed VHP assuming power.

But the assembly was dissolved, and Haryana placed under President's rule, in November 1967. Congress won the Vidhan Sabha election in 1968 and Bansi Lal became Chief Minister. Birender Singh's VHP came creditable second to Congress in the election.