Professor of political science and author Zoltan Hajnal and political science doctoral student Jeremy D. Horowitz wrote an op-ed for the L.A. Times that is chock full o' common sense conclusions.
They explain why, without question, minorities do better under Democratic administrations than under Republicans, and it's all backed up by raw data. Facts are facts, Republicans, no matter how you try to ignore or bend them.
Nor does it matter how many times Mitt Romney (who famously said, “It would be helpful to be Latino”) whispers to his donors at secret meetings how President Santa Obama handed out free gifts to all you not-white, not-wealthy, "illegal" people. There's a reason (or 12) why BigBucks McWrongerson lost the election, and it had nothing to do with socialist, Marxist, Kenyan handouts:
The data we analyzed show unequivocally that minorities fare better under Democratic administrations than under Republican ones. [...]
Under Democratic presidents, the incomes of black families grew by an average of $895 a year, but only by $142 a year under Republicans. Across 26 years of Democratic leadership, unemployment among blacks declined by 7.9%; under 28 years of Republican presidencies, the rate increased by a net of 13.7%. Similarly, the black poverty rate fell by 23.6% under Democratic presidents and rose by 3% under Republicans.
The results for Latinos and Asians, though based on fewer years of data, show the same pattern. [...]
More important, these gains do not come at the expense of whites... These numbers show that economic condition need not be a zero-sum game pitting races and ethnicities against one another.
This also can't be rationalized by asserting that Democrats just happen to be in power when things are looking up, or because of the fiscal policies of Republicans who preceded them.
Additionally, the longer Democratic administrations are in office, the more minorities experience economic gains, but the opposite is true under Republican presidents. The authors attribute this to education, economic, and immigration policy differences between the two parties that benefit minorities, whose population numbers are growing... one more fact that scares the pants of the GOP.
Please read the whole piece for specifics. In fact, that might be a particularly wise thing for Republicans to do.