(CNN) - Barack Obama appears to have increased his lead over John McCain in the race for the White House, though the two presidential hopefuls continue to be locked in a close fight, according to a new CNN poll of polls.
According to an average of four recent national polls, Obama holds a four point advantage among registered voters over the Arizona senator, 47 percent to 43 percent. Ten percent said they remain undecided.
Watch what's next for McCain and Obama
A CNN poll of polls taken last week showed the Illinois senator with only a two point advantage over McCain. But three of the four polls were conducted before Hillary Clinton formally dropped out of the race on Saturday, and may not fully reflect the current state of public opinion.