The Congress has shut the door on an alliance in Delhi for the national election, Arvind Kejriwal stressed today in an interview to NDTV, declaring that his Aam Aadmi Party (AAP) was preparing to contest alone in the capital in the polls now just weeks away. "They (Congress) have refused to go for a gathbandhan (alliance). It appears they are firm," Arvind Kejriwal said days after he said at a public rally that he was "fed up" of asking the Congress to agree to teaming up. That comment didn't go down well with the Congress and its Delhi chief Sheila Dikshit, who said while her party was accused of being the saboteur, no such talks had taken place.