The Tea Party movement isn't infiltrated by any other political party and is in no way some reincarnation of old guard Southern Democrats. It is a grass roots movement that is growing quickly nationwide. They are infiltrating the Republican Party though and with good effect.
I never did understand the black's overwhelming affinity for the Democrat Party for the past 30-40 years. The Democrat Party has done very little for them and actually caused them great harm. Not to mention the Civil Rights movement in the early 1960s would have gone nowhere without Republican support. The Democrats are still controlling blacks, by in large through dependency on various forms of welfare and other propaganda, except now they have managed to do it with their blessing. In fact, the Democrats have been so successful in controlling blacks this way they are franchising out the technique and using the same strategy to politically control poor Hispanics and whites among others.
You are completely wrong about the Tea Party being tied to Southern Democrats. The reason there are very few Southern Democrats nowadays is the Democrat Party has become far too liberal and leftist for them. They have had no where to go but Republican and Independent. The Democrat Party is at its lowest identity level in over 20 years while the Republican identity level is rising. This will continue until the Democrat Party moves toward the political center in a big way. Right now the 10% comprising the far left in this country control the Democrat Party with an iron fist.