So, finally, the juggernaut of Prime Minister Narendra Modi and Bharatiya Janata Party (BJP) president Amit Shah has been stopped by Arvind Kejriwal-led Aam Aadmi Party (AAP) in Delhi.

Arvind Kejriwal waves at AAP volunteers as they celebrate the party's victory in the Delhi Assembly polls. Pic: PTI

AAP recorded a landslide victory in the 70-seat assembly in the Capital winning 67 seats, the BJP was reduced to just three seats. Congress, the party that had ruled Delhi for almost five decades, has been almost wiped out from the assembly.

What went wrong for BJP and what worked for AAP and? Here are some key reasons:

1) Delay in holding elections

Had BJP decided to hold the Delhi assembly elections immediately after the Lok Sabha polls and other assembly elections (including Haryana and Maharashtra where they came to power), the story could have been different. Why polls were delayed and how it worked for AAP is now history.

2) Targeting AAP

After the announcement of the elections, BJP confidently decided to take on AAP and Kejriwal. By calling him naxalwadi (a left extremist) and bhagoda (runaway), BJP actually played into the hands of AAP. Kejriwal could turn around the game in AAP’s favour by projecting the party as the underdog fighting for the common man.

3) Chief Minister candidate

The launching of Kiran Bedi as BJP’s chief ministerial candidate does not seem to have gone down well with the voters. Bedi, who was earlier associated with Anna Hazare’s movement, joined the BJP just before the campaigns began. And that may have worked against it.

The point to remember here is that BJP has not actually lost any vote share (down only 1%).