Find the election winner
You can write this simpler:


if(winners.length === 1){
    return winners[0];
}
winners.sort();
return winners[winners.length - 1];



Like this:

winners.sort();
return winners[winners.length - 1];


Because if winner contains one element, winners.sort() will do nothing anyway.



vObj is a poor name for a map of vote counts per name.



It could be a good idea to decompose the implementation to smaller functions with a single responsibility:


Build a map of vote counts
Find winners
Find the single winner