Liberian President Ellen Johnson Sirleaf is set to be sworn in Monday for her second term in office, after handily winning re-election in a November vote.

U.S. Secretary of State Hillary Clinton traveled to the capital, Monrovia, for the inauguration ceremony, which is also expected to be attended by 30 heads of state.

Mrs. Sirleaf has pledged to address economic problems in Liberia. She became Africa's first democratically elected female president in 2005, and last year was one of three women awarded the Nobel Peace Prize.

Clinton is on a four-nation tour of Africa that will also include stops in Ivory Coast, Togo and Cape Verde. She is scheduled to meet with leaders in each country.

A senior Obama administration official traveling with Clinton said Monday that her visit to those countries underscores the U.S. commitment to democratic governance.

Mrs. Sirleaf won more than 90 percent of the vote in a runoff against rival Winston Tubman, whose party boycotted the runoff alleging cases of fraud in the first round of voting.

International election observers have said both elections were credible.