The list-sharing agreement, which reveals a new level of cooperation between the GOP and its surprise front-runner, could be highly beneficial to both sides.

For the Trump campaign, it means access to a database containing a trove of information on more than 200 million Americans, which can be used to power a get-out-the-vote effort. And for the RNC, it means that any information Trump collects from his supporters, many of whom are not traditional Republicans, will be fed back into the database for future use by the party and its candidates.

The agreement, which was confirmed by multiple sources, is similar to one signed by the campaigns of most of the candidates for the GOP nomination.

But it is more notable for Trump, both because the billionaire real estate showman continues to spar with the party and because critics have increasingly questioned whether his campaign has assembled the infrastructure considered necessary to capitalize on his strong poll numbers in key early states.