When Opposition parties won in Delhi and in Bihar, Electronic Voting Machines (EVMs) were well and good. But now that they've lost in Uttar Pradesh and Uttarakhand, the machines have suddenly become controversial.

Meanwhile, the Election Commission today rejected calls from various parties for the use of a ballot paper system during the Delhi municipal corporation polls on April 22.

Delhi Chief Minister Arvind Kejriwal had asked the Chief Secretary to direct the state Election Commission to use paper ballots instead of EVMs, just days after Bahujan Samaj Party chief Mayawati raised questions over the machines following her party's dismal show in Uttar Pradesh Assembly election.