As Mitt Romney deliberates on his most important pre-convention political decision, the identity of whomever he selects as a running mate isn’t the only choice he and the vetting team must make.

The timing of that vice-presidential unveiling can have a major impact on the race, as the experience of his 2008 predecessor demonstrated fully.

Four years ago, 38 million television viewers watched Barack Obama’s acceptance speech at the Democratic National Convention in Denver, shattering previous records for convention viewership and underscoring the commonly accepted belief that the Democratic ticket had an untouchable advantage in media buzz.

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