Many know that political campaigns cost millions of dollars, but where it comes from is a mystery to most. Follow Eoin Cunningham in his new series as he explores the world of political lobbying and campaign finance.

Image credits:

 “Donald Trump” by Gage Skidmore is licensed under CC BY-SA 2.0

“Hillary Clinton” by Gage Skidmore is licensed under CC BY-SA 2.0

“Washington DC – Capitol Hill: United States Capitol” by wallyg is licensed under CC BY-NC-ND 2.0

“Washington D.C.: Pennsylvania Avenue & United States Capitol” by Traveller-Reini is licensed under CC BY-NC-SA 2.0