Political scientist Julia Azari, who has written a book about presidential rhetoric, suggests that Obama's rhetoric has so far failed to be transformative:
This may be true at the single-policy level. It is true at the sound bite level. Obama's not good at war cries, or slogans, or, less cynically, single phrases that sink into the national consciousness.
A more nuanced critique of Obama’s rhetoric might suggest that, especially early on, his rhetorical choices fit very neatly into existing terms of debate. His speeches have offered very little in terms of new ways of understanding the central policy issues of his presidency – healthcare, the minimum wage, immigration, climate change and the environment. I’m not arguing that with better framing, Obama would have been more successful on these issues. But the old frames have allowed opponents to define the discussion, even after policies are signed into law. Furthermore, debate about issues like immigration and minimum wage continue to invoke the same tradeoffs and considerations that they have in the past. Effective rhetoric would cast familiar issues – particularly ones like immigration, which tend to cut across party lines – in terms of values and considerations that are both novel and resonant. That might not be enough for policy change now, but it might allow for it later, under the right conditions. This is admittedly a high bar for presidential rhetoric, even for someone with Obama's facility with certain kinds of public speeches.
This may be true at the single-policy level. It is true at the sound bite level. Obama's not good at war cries, or slogans, or, less cynically, single phrases that sink into the national consciousness.