They also hit out at the Arvind Kejriwal-led Aam Aadmi Party government for "misgovernance" in Delhi.
Vardhan, who voted at a polling booth in Krishna Nagar area in East Delhi, asserted that the BJP will work to restore the happiness of people.
"We will work to restore the happiness of people and provide relief to them from those who have become synonymous with corruption, scams, inefficiency and abusive discourse," he said without naming anyone.
She slammed the Delhi government for its alleged "misgovernance" and defended allegations against the BJP-ruled municipal corporations.
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"In Delhi, misgovernance comes from the Delhi government. The ruling AAP spent on advertisements instead of creating awareness about the ways to fight dengue and chikungunya," she said, adding that the civic bodies were working under financial constraints as the government has "failed" to provide them funds.
Union minister Vijay Goel exercised his franchise at a polling station near Raj Niwas.
Delhi BJP chief Manoj Tiwari, who is not a voter in the municipal corporation elections as he lives in New Delhi Municipal Council area, started his day by offering a prayer at the Balmiki Mandir on Mandir Marg, and then met the party workers engaged in election work in the city.
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