ST. PAUL, Minn. — Republicans swung their convention back on a political track Tuesday after a pause for Hurricane Gustav, giving President Bush an abbreviated slot for a televised address promoting John McCain's candidacy for the White House. Former Democrat Joe Lieberman and TV star and former Sen. Fred Thompson got prominent roles.

The president will address the convention by satellite from the White House for about eight minutes, a condensed appearance worked out in negotiations between Bush and McCain aides. Bush originally had planned to speak for 15 minutes. The White House also left it up to McCain's campaign as to whether Bush made his remarks in person or in a televised appearance from Washington, and it was decided he would speak from the White House.

McCain's little-known running mate, Alaska Gov. Sarah Palin, provided an unwelcome convention distraction a day earlier with the announcement that her unmarried 17-year-old daughter is pregnant and that a private attorney has been retained to represent the governor in an investigation into the dismissal of the state public safety commissioner. The revelations raised questions about whether Palin's background was fully explored before she was picked.

McCain, touring a Philadelphia fire house, said Tuesday, "The vetting process was completely thorough and I'm grateful for the results." His advisers say he had known about the governor's daughter's pregnancy.

The White House said it should not be a political issue. "I think that President Bush ... believes this is a private family matter," White House press secretary Dana Perino said Tuesday. "The family obviously loves their daughter very much, and that this baby, when it is born, will have the full love and support of a very loving family."

There was a flurry of last-minute changes as Republicans tried to patch together a new schedule for the three remaining days of their convention. Monday's opening session was abbreviated and stripped of sharp political rhetoric as the nation kept its focus on Gustav, once seen as a major threat to the Gulf Coast. The hurricane turned out to be less devastating than feared, allowing the GOP to lift the McCain-imposed ban on partisanship.

Bush had been in line to speak to the convention in person Monday night but instead went to Texas to be with disaster workers as Gustav threatened the Gulf. Some Republicans had breathed a sigh of relief to have the unpopular president out of the way and off the television screens. But Bush still was guaranteed a warm welcome from fellow Republicans in the convention hall.