Not sure I agree with your general assessment of the makeup of the American media. Many believe/complain that the media is largely controlled by liberal Democrats.
A huge part of the current political story is the media's love-fest of/with Obama.
A huge part of the story is how the media and public have been swept up in the excitement of this new, different, charismatic, articulate, intelligent man.
A huge part of the story is how lopsided the media coverage has been - in it's most extreme case, we had planeloads of journalists (and every network anchor) accompanying Obama's European tour (newsworthy, without doubt), while in contrast during the same week, poor old John McCain landed his plane in middle America (not so newsworthy, without doubt) to be greeted by a solitary journalist. The enormous coverage of Obama's trip was essentially one long advert for Obama, and resulted in a virtual media black-out for John McCain.
Put simply - Obama was, and is, a better news story than John McCain - and the media coverage has reflected that.
You are correct, that Obama does offer hope. But dig deeper than the rhetoric - can you say specifically what he proposes? How the concept of hope could be transformed into real and measurable change? That is the concern here - most people can't say, and don't know. That part of the message is NOT getting through. Maybe the media is to blame as it deals mainly in soundbites and photo opportunities, maybe the legendary short attention span of the average American are to blame.
McCain is not exciting, new/different, passionate, charismatic, or even very articulate. He seems like an old man. Lord knows, America doesn't need/want 4 more years of Bush style Republicanism. But IMO, Obama seems too slick and media savvy, too good at manipulating the press, too good at knowing the right thing to say at the right moment (but is it really what he thinks), too adept at playing both sides of the race issue (very skillfully) according to who his audience is.
At the moment it seems we have a 'perfect storm' of media and politics: on one side there is the media who want a charismatic and intelligent candidate who is groundbreaking/camera ready and delivers a message of hope/change. On the other side is a candidate who understands the power of media to create myths and heros, and is willing/able to give every soundbite and photo op with poise and finesse. It is a fairy tale unfolding before our eyes, and Americans love happy endings.
But where do we stand as a country when the victory speeches have faded, and it's time to get down to day to day life? Will the media then begin the business of tearing him down? And will our/their political idol turn out to have feet of clay?