What is the meaning of leading and trailing in election?

Prime Minister Narendra Modi and the Bharatiya Janata Party (BJP) are seeking re-election after a landslide victory in 2014. They face a fragmented opposition but competition could come from the Congress Party, led by Rahul Gandhi.

answer:

the aam aadmi party will contest lok sabha polls in maharashtra and would also seek alliances with regional parties, the party's state brigadier (retired) sawant said.  

the party's formula on seat-sharing would be finalised by february 15, he added.  

"we will fight all seats in mumbai and on a few seats in the rest of maharashtra after forging alliance with like minded parties. we are working on a seat sharing formula and it will be finalised by february 15," sawant   ..  

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