Ayman al-Zawahri, al-Qaeda's deputy leader, has appeared on a video shown by the Arab satellite channel, al-Jazeera.
Zawahri offered advice to the US
In the tape he vows "to continue fighting [the US] until the last hour".
The video appeared to have been recorded before the US elections.
"Vote whoever you want, Bush, Kerry or the devil himself," Zawahri declared. "What concerns us is to purge our land from the aggressors"
The broadcast follows Osama Bin Laden's own contribution to the US election, which was released only a few days before the vote on 2 November.
The al-Qaeda leader told Americans: "Your security is not in the hands
of Kerry, Bush or al-Qaeda. Your security is in your own
'Nation of patience'
In the latest tape, Zawahri, wearing glasses and a white turban, sits in front of a brown background, with a rifle at his side.
A spokesman for al-Jazeera said the tape received on Monday lasted eight minutes, but the channel had decided only to show the parts it considered newsworthy.
In it, Zawahri said: "I have a final piece of advice for America that I must give. You must choose between two ways of behaving towards Muslims.
you deal with them on the basis of respect and mutual interest or
you treat them as easy prey."
"But you must know that we are a nation of patience and
perseverance... We are a nation of patience and we will continue fighting you [the US] until the last hour."