Actress Scarlett Johansson is surprised U.S. presidential candidate Barack Obama responds to her incessant e-mails - because she's convinced he has more pressing matters on his agenda.

Johansson, whose twin brother Hunter is working on Obama's U.S. Presidential campaign, regularly offers the politician advice via e-mail. pressing matters on his agenda.

And the 23-year-old star is "amazed" Obama has the time to reply to her, because he's under constant pressure from political pundits. pressing matters on his agenda.

Johansson says, "Someone like the senator, who is constantly travelling and constantly 'on,' how can he return these personal e-mails?" (JMA/PYN/LJ) pressing matters on his agenda.

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