I’m looking for Voting and Registration micro data files for the 1988, 1990, and 1992 elections.
The Voting and Registration Supplement for the Current Population Survey has been conducted every two years starting in 1964. You can download the microdata from IPUMS CPS using these steps: From the IPUMS CPS main page, follow the link to “browse and select data.” Then click on “Change Samples.” Choose the “Supplement Topics” tab and the “Voter” sub-tab. Then select the years you are interested in and click “submit sample selections.” Then choose what variables you want under “select variables.” To download the extract choose “View Cart.”
See here for more information on the supplement: https://cps.ipums.org/cps/voter_sample_notes.shtml