They have already told the media about it... but b/c McCain got the nomination months ago it was discussed then.
For me, I didn't pay much attention to McCain and the Republican party during their primaries b/c I was more-so focused on the Democrats.
http://www.suntimes.com/news/politics/obama/1002282,obamadems061208.article
McCain has his own issues in his party. Many conservatives opposed the four-term senator, who has worked with Democrats and strayed from GOP orthodoxy on some issues, before he sealed the GOP nomination in February. Many still express reservations about him as the party leader.
Because McCain secured the party nomination much earlier in the campaign season, Republicans have not been pressed about their endorsements like Democrats have. But only a handful have publicly withheld their support for him. That includes Nebraska Sen. Chuck Hagel, who long has bucked the party hierarchy, and Rep. Ron Paul of Texas, who is running his own presidential campaign.
article goes on to state that other Democratic candidates faced public "resistance" from fellow Dems as well.
Then it goes on to discuss just what someone else pointed out in this thread...
Folks have to think about their political future AFTER November 4.
Rep. John Barrow, for example, represents a coastal Georgia district where blacks make up more than 40 percent of registered voters, mainly in urban areas around Savannah and Augusta. Not surprisingly, Barrow -- who won his last election by fewer than 900 votes -- endorsed Obama in February.
But Marshall, the Democratic incumbent in a neighboring district in rural central Georgia, has stayed quiet.
Marshall's district is less than one-third black, and he needs the support of white Republicans to win, including votes from the military community around Robins Air Force Base. He faces a fresh challenge this year from a retired Air Force general.
I'm not saying that you are wrong...but I just don't think it's simple to make it seem like these are all new issues simply b/c it's Barack that's the candidate.