>I'm trying to run this query:
>
>

>DECLARE @voter_id INT
>SET @Command = 'SELECT @voter_id = voterid FROM tblCamp_CT WHERE VoterId = ' + CAST(@VoterId AS VARCHAR(20)) + ' AND ' + @Query
>EXEC (@Command)
>

>
>and I'm getting the error
>
>

>Must declare the scalar variable "@voter_id".
>

>
>What am I not seeing here???

You declared the variable as @Voter_ID, but using it later in the query as @VoterID (no _)

In addition, I suggest to not embed the variable into the query as you do.

Try:

declare @VoterID int, @SQL nvarchar(max)
set @VoterID = 1

set @SQL = 'SELECT top (1) @Voter_ID = VoterID FROM tblCamp_CT where VoterID = @VoterID  AND ' + @Query

execute sp_ExecuteSQL @SQL, N'@VoterID int OUTPUT' @VoterID OUTPUT