Why Do Poor Whites Overwhelmingly Vote Republican?

I have always felt that Whites, particularly the poor Whites in the deep south and in middle America, who vote Republican even against their own economic interests, were doing so because of race and their racist antipathy towards Blacks. Since the Bushites came to power in 2000, median household income has declined by 3%, those without healthcare have risen by 9%, and poverty has risen by 7%. Blacks who are only about 3% of the total voters, overwhelmingly vote democratic, because they recognize how poisonous the repugs are to their well-being. On the other hand, Whites, who are over 90% of the voters, and are most affected by the anti-poor policies of the Bushites, are fairly evenly split between democratic and republican voters. But, the vast majority of poor Whites who live in the deep south and middle sections of the country, have, and continue to vote republican, by a wide margin. They apparently have discovered the racist core of this party, and votes in sympathy and in solidarity with it. So, in spite of the fact that this party is pursuing economic polices that is continuing to make them poorer and poorer, their racism continues to trump their economic self interest and better judgement. What a pity, but so be it!