The DNC contribution is widely reported, it's not a secret. The date of that contribution was 11/03/88 and the Bush 41 vs Michael Dukakis election was five day later on 11/08/88. "Final Push" contributors are the party faithful, be it Democrat or Republican. She has been contributing to Republicans from the moment that she saw the opportunity to enter the Republican fold. This is supposed to forgive her earlier Democrat contributions.
Ask and ye shall receive. Why do people argue over stuff like this? Gore invented the internet so we could research this kind of stuff and argue over the significance of the donations, not that they actually occurred. ;-)
http://www.newsmeat.com/washington_political_donations/Harriet_Miers.php