Assemblywoman Grace Meng made history becoming the first Asian American named to Congress Tuesday.
Halloran asked the Queens Democrat if her attendance during campaign season was "inappropriate."
Queens democrat has outraised republican rival by 55-to-1 margin.
City councilman and Republican congressional candidate says Meng has something to hide if she refuses.
Grace Meng greeted voters at the 71st/Continental Avenue subway station.
Rep. Charlie Rangel's primary win paves the way for a 22nd Congressional term.
The candidates have engaged in a whirlwind primary battle that has turned nasty in the final few weeks.
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