The Tea Party is not funded by much of anybody but the grass roots members in its various locations. How in the world could the Koch Bros. or anybody else fund an organization that the IRS won't allow to be recognized as a bonafide incorporated organization and thereby have a structure that can receive contributions? There is no national Tea Party, but only grass roots groups in various states and cities.
"I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it." --Benjamin Franklin 1776
The Tea Party is a name assumed by unaffiliated groups that for the most part and on the local level are not funded by anyone, nor do they take up social issues or care about either party all that much. They focus on fiscal issues only and don't talk about abortion or contraception or gay marriage or anything other than fiscal issues.
It was only when people like Sarah Palin and others tried to highjack the movement did the national perspective get skewed. There are many Super-Pacs that call themselves Tea Party groups, but are actually just Far Right Extremists trying to use the Tea Party movement as a cover. These are the ones that the Koch's and others are involved in - not the real Tea Party movement.
In other words, there is no difference between George Soros and the Koch Brothers, at all. Both use Super-Pacs to cover their actions, which is what freedom and liberty allow.
Now, if you want to end freedom and liberty, we can talk about that. But I doubt it would get too far.
Both major parties have their rich daddies paying for them behind the scenes and causing trouble with lies and distortions being put on the air in TV commercials, and lobbying to make them more rich. However, both groups also do good things for the community as well, including George Soros and the the Koch Brothers.
Regardless what one calls it, though, it's still uncalled for as the wealth/money was... or should have been (if we didn't have such a jacked-up system)... already taxed under the original owner.
If, when defending your support for Donald Trump, and your response is,
"But but but... HILLARY!!!", then you lost the argument before you even began.