bush's re-elect, approve/disapproves, and general poll numbers are almost identical...

after seeing a Pew poll on Bush's approval rating (which is 43%!!), his latest Rasmussen (K 47% B 43%), and his re-elect (44% thanks to today's Zogby), it looks like his numbers are converging at 43-44%.
it seems significant. then again, I don't know a hell of a lot about polls, so instead of shooting off my mouth, perhaps someone with penetrating wisdom can do it for me....