Tevi Troy devotes a National Affairs article to the evolution of political party conventions.

While the 2016 Republican primaries turned out to be less close than they seemed for a time, this year may still presage a new era in conventions, one marked by bitter intra-party divides, instantaneous communications capabilities, and technology-driven efforts by individuals and party factions to circumvent the existing party machinery to reach the people directly.

It is too soon to know how this will play out in future election cycles. But in the past, conventions were shaped and influenced by a combination of changing party needs and evolving technological capabilities. It is reasonable to surmise that future technological and ideological developments will reshape the American invention that is the party convention in ways as yet unforeseen. For this reason, and in preparation for this summer’s Democratic and Republican quadrennial shindigs, it is worth exploring how conventions came to be, what they meant for most of our history, why recent conventions have all been predetermined affairs, and what it would mean if future conventions were not quite so predictable. …

… Once politicians realized they could use conventions to advertise for their parties, they sought more control over the messaging and the convention itself; any misstep posed large risks in terms of the image the party and candidate presented to the listening or watching public.

The same forces are at work going into the 2016 conventions. Much has been made this year about delegate counts throughout the primaries, especially on the Republican side, as an open convention looked possible. And, had the score been a bit closer, every convention rule determination would have had the potential to make or break one or more of the candidates. While it does not look likely that either party will have an open or contested convention this year, both sides are dealing with bitter intra-party division and a new media environment.

Both the GOP and the Democrats have seen some brutal public squabbling between the so-called “establishment” candidates and the “outsiders” this year. Going into Cleveland this summer, Republicans in particular face the challenge of a highly divisive, unconventional candidate whose very appeal seems to rest on his unscripted appearances and unpredictability. The power of the party apparatus has been significantly diminished, especially as the presumptive Republican nominee won primaries with a message of disdain for traditional politics.

Technology has played a huge role in this shift, as candidates?—?and everyone else?—?can use online fora to gain immediate access to millions of readers and viewers, drastically reducing the power of the party to influence, let alone control, public debate. Instead, we now see in Donald Trump a candidate whose media strategy is largely predicated on his personal Twitter pronouncements, as well as frequent appearances on big-market TV shows?—?a stark break from the careful messaging candidates have used in the past.