Anti-graft party heading for big win in Indian capital in a blow for Modi's ruling Hindu party

Leader of the Aam Aadmi Party, or Common Man’s Party, Arvind Kejriwal, center, waves to the crowd as his party looks set for a landslide party in New Delhi, India, Tuesday, Feb. 10, 2015. The upstart anti-corruption party appeared set to install a state government in India's capital in a huge blow for Prime Minister Narendra Modi's Hindu nationalist party. As early trends pointed to an overwhelming win for the AAP, the party's jubilant supporters began cheering and dancing in celebration, yelling "Five Years Kejriwal.” (AP Photo/Manish Swarup) (The Associated Press)

Leader of the Aam Aadmi Party, or Common Man’s Party, Arvind Kejriwal waves to the crowd as his party looks set for a landslide party in New Delhi, India, Tuesday, Feb. 10, 2015. The upstart anti-corruption party appeared set to install a state government in India's capital in a huge blow for Prime Minister Narendra Modi's Hindu nationalist party. As early trends pointed to an overwhelming win for the AAP, the party's jubilant supporters began cheering and dancing in celebration, yelling "Five Years Kejriwal.” (AP Photo/Manish Swarup) (The Associated Press)

Aam Aadmi Party, or Common Man’s Party, leaders Arvind Kejriwal, center, and Ashutosh, second left, hug as they celebrate news of their party's performance in New Delhi, India, Tuesday, Feb. 10, 2015. The upstart anti-corruption party appeared set to install a state government in India's capital in a huge blow for Prime Minister Narendra Modi's Hindu nationalist party. As early trends pointed to an overwhelming win for the AAP, the party's jubilant supporters began cheering and dancing in celebration, yelling "Five Years Kejriwal.” (AP Photo/Manish Swarup) (The Associated Press)

An upstart anti-corruption party is heading for an overwhelming victory in elections to install a state government in India's capital, a potentially huge blow for Prime Minister Narendra Modi's Hindu nationalist party.

The trends released by India's Election Commission show that the Aam Admi Party, led by Arvind Kejriwal, is leading in 56 of the 70 seats while Modi's Bharatiya Janata Party is ahead in eight seats. More than one-third of the vote has been counted so far.

If the trend holds, it would be a major disappointment for Modi and his party, which has been on a winning streak since sweeping national elections in May.