Dan Halloran is literally appealing a bribery conviction.
There's no way Republicans will nominate him, and if they did, they'd get flattened.
Eric Adams (D/WFP) 77%
Dan Halloran (R/C/Liberal) 23%
If he was not caught, he was seen as a GOP star, he won the blue-collar Asian/White district in Queens as a city councilman, he could have beaten Grace Meng in 2012.
Halloran would have won the mayoralty in these times, he ran a law and order campaign as a city councilman.
Seriously, Michael Grimm, who is also a convicted felon probably has a better chance of being elected Mayor in 2021.