Fredreka Schouten for USA Today:

The GOP presidential candidates aren’t the only ones calling, texting, emailing, schmoozing and all-out lobbying the men and women likely to be delegates to the Republican National Convention.

The deep-pocketed outside groups known as super PACs have joined the frantic, behind-the-scenes campaign now underway across the country to influence the 2,472 delegates poised to play an outsize role in what could be the Republican Party’s first contested convention in four decades.