Video: Arrest of Giuliani Associates Tied to Ukraine Scandal Renews Scrutiny on Campaign Finance Rules

"It's very clear that the goal of these contributions was to buy access in order to advance their own personal financial interests and the interests of foreign government officials," Brendan Fischer, federal reform director at the watchdog group Campaign Legal Center, told ABC News. "That is a pretty clear example of the problems with our with our political system -- that in order to have your voice heard by powerful politicians, you have to give them money."

Watch the full video here.