(CBS News) Despite conservative enthusiasm surrounding the announcement that Paul Ryan has been tapped as Mitt Romney's presidential running mate, a new Gallup tracking poll shows that the presumptive GOP nominee has not benefited from any material bounce in its poll since the pick was made public.
According to the survey, 47 percent of registered voters surveyed in the four day period following Romney's announcement said they supported Romney, while 45 percent said they would vote for President Obama. In the four days prior to the announcment, 46 percent backed Romney and 45 percent backed Mr. Obama.
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According to that poll, 39 percent of Americans said they thought Ryan was either "excellent" or "pretty good" as a VP choice, while 42 percent called the choice "only fair" or "poor." Nineteen percent expressed no opinion.
By contrast, 46 percent of voters called Sarah Palin an "excellent" or "pretty good" choice in 2008, and 46 percent said the same of Biden. Compared to recent vice presidential candidates, only Dan Quayle has scored higher than Ryan among those who believed him to be an "only fair" or "poor" VP pick.
