Jet, Brooks has good reason to do so.
How many millions of our tax dollars will they blow ‘investigating’ a well proven non-existent problem. 31 instances of voter fraud out of a billion ballots cast?  Sounds about right. 
http://www.cnn.com/2017/01/26/politics/trump-voter-fraud-naacp-brooks-blitzer-cnntv/ 
Brooks: 
" ...The only place you will find millions of fraudulent ballots are right beside that fake birth certificate for Barack Obama, inside the imagination of President Trump. They don't exist," 
"We have seen our rights denied as Americans. Particularly seniors, African-Americans, Latinos and younger people," 
"This is a new, old, bad, expensive idea. The definition of fraud, waste and abuse. We don't need to go down that road. In fact, what he needs to do is strengthen voting rights." 
Brooks said he would strongly encourage Trump to "focus on ensuring access to the ballot box instead of erecting barriers to the ballot box. This is something literally people have died for."