(CNN) - It's certainly not an e-mail that will put the vice presidential questions to rest.
"We're getting ready to share some exciting news," Mitt Romney's campaign manager, Matt Rhoades, e-mailed supporters on Thursday. "Sometime between now and the Republican convention, Mitt will be announcing his choice for VP."
The presumptive Republican presidential nominee has repeatedly declined to answer questions about who his campaign is vetting to join the ticket. He broke with that only once, when he told reporters that - contrary to one news organization's report - Sen. Marco Rubio of Florida was indeed being vetted.
Rhoades' e-mail to supporters was also a fundraising solicitation. "Every week until the VP announcement is made, one lucky supporter will win the chance to meet Mitt and his choice for VP," he wrote, asking for a $3 donation for entry into that drawing.
The Republican National Convention begins on August 27 in Tampa, Florida.
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