Why did some Union citizens refuse to vote for Abraham Lincoln during the Election of 1864?

They disagreed with many of his decisions during the Civil War.

Many citizens did not agree with who Lincoln chose as his running mate.

The majority of Northern voters did not want to abolish slavery completely.

His indecisiveness during his first term made them feel he couldnt handle the job.

Question

Why did some Union citizens refuse to vote for Abraham Lincoln during the Election of 1864? 

 They disagreed with many of his decisions during the Civil War. 

 Many citizens did not agree with who Lincoln chose as his running mate. 

 The majority of Northern voters did not want to abolish slavery completely. 

 His indecisiveness during his first term made them feel he couldnt handle the job.