The mayors seem to be relishing their new role as king-makers, and Mr Webb will be sending the conference's detailed urban agenda to every presidential candidate.

ECONOMIST: City politics

Superdelegates include all the Democrats in Congress, and they have mixed feelings about their roles as king- or queen-makers.

NPR: Hundreds of Superdelegates Remain Undecided

So far 28 companies, including telecom equipment makers ZTE and Huawei and bus manufacturer Xiamen King Long Automotive, have signed up for the Ruba-Haier industrial park.

FORBES: China's Khyber Pass