Tarini Parti for Politico:

The 2016 presidential race has already become the super PAC 2.0 election.
The election will likely break all outside spending records, but it’s the experimental nature of how that money is raised and spent that will have a lasting effect on future elections.

From the types of committees created to the timing and number of outside money vehicles involved, with billionaire donors now watching more closely than ever before, supporters of presidential hopefuls have added innovative twists to how they raise and spend outside money. They are going one step beyond the model supporters of President Barack Obama and Republican Mitt Romney used in 2012 – the first presidential election that used super PACs.