This final composite graph of the 6 major National tracking polls shows Obama still opening up a lead over McCain.
There was no "tightening" in this coming Democratic blowout.
Counting today, Obama's lead has increased by small amounts in the last five consecutive Composites.
Most elections conclude with a tightening of the race, as the underdog picks up some final bit of steam. But this one seems to have been an exception -- McCain began closing the gap, but then Obama just pulled away all over again
TPM Election Central | Talking Points Memo | TPM Track Composite: Obama Approaching 52%