You can find out who is making donations to local and state politicians and what the politicians are spending that money on at a website maintained by the Department of State. All are required to file regular reports on the donations and expenditures, and you can look up those reports here. One trick used by politicians to make it more difficult to find their reports is to use a vague or unrelated name. Christopher St. Lawrence, for instance can be searched by entering his last name. He also has a political group that gathers money for him under the name Leadership that’s Working. Enter that name in the search field and you will find the second source of his funding.
The page at the Department of State looks like the screenshot below. When you are on the site, move down to right below the heading Query the Database, click on View Candidate or Committee by Name, and then enter the politician’s name.