In a survey conducted by the firm Edelman Berland, voters were asked to compare Democrats and Republicans across a number of brand attributes.

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Market researcher Penn Schoen Berland interviewed 2, 506 licensed Americans over 18 years old in 25 cities from coast to coast over a week in May.

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According to AllThingsD, Leslie Berland, Amex's SVP of digital partnerships and development, says the solution will head to the likes of Facebook and other platforms at some point as well.

ENGADGET

Adobe, along with research firm Edelman Berland, conducted an online survey of 1, 250 adults in the U.S., 18 years or older including 1, 000 general population and 250 marketing decision makers.

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Amex's senior vice president for digital partnerships, Leslie Berland, said that the success of the firm's existing social media schemes suggested that there was "significant power in combining our assets with Twitter's platform".

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Some 72% of social media users immediately post opinions on social sites after watching a film, and 8%, annoyingly, do so while a film is actually playing, according to a recent survey conducted by Penn, Schoen and Berland for the Hollywood Reporter.

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"Based on the initial success of Amex Sync for offers, we know there is significant power in combining our assets with Twitter's platform to bring value to Cardmembers and merchants, " said Leslie Berland, Senior Vice President, Digital Partnerships and Development at American Express.

ENGADGET: American Express cardholders can now buy goods by tweeting special hashtags