Control of the US House, Senate is up for grabs in the Nov 2 election

WASHINGTON - Less than a week before Election Day, US President Barack Obama is using the power of his office to reach Democratic voters in a final effort to get supporters to the polls and nudge close races in his party's favor and limit congressional losses.

Though Obama is off the campaign trail for three full days this week, he's personally targeting key Democratic constituencies from the White House, holding conference calls with union activists and campaign volunteers, and doing interviews with radio stations that draw largely black audiences. He'll also target younger voters when he tapes an appearance on satirical news show The Daily Show with Jon Stewart on Wednesday.