WASHINGTON (Reuters) - U.S. President Barack Obama pledged on Wednesday to work for a smooth transition of power with president-elect Donald Trump, the Republican winner of Tuesday's election, who has promised to undo Obama's top domestic and foreign policy initiatives.

NEW YORK (Reuters) - Democratic presidential candidate Hillary Clinton on Wednesday conceded her election loss to Republican Donald Trump and said she offered to work with the president-elect.

(Reuters) - Republican Donald Trump stunned the world by defeating heavily favored rival Hillary Clinton in Tuesday's presidential election, ending eight years of Democratic control of the White House and sending the United States on a new, uncertain path.

WASHINGTON, Nov 9 (Reuters) - Democratic President Barack Obama called Republican Donald Trump to congratulate him on his election victory early on Wednesday and invited him to the White House on Thursday to discuss the transition of power, the White House said.

AZUSA — One person was killed and three others were struck by gunfire Tuesday near a polling station in the Southern California town of Azusa, prompting authorities to lock down the polling place, a surrounding park and adjacent schools, officials said.

NEW YORK — Republican Donald Trump held slight leads in the vital battleground states of Florida, Virginia, North Carolina and Ohio on Tuesday, clinging to a narrow advantage over Democrat Hillary Clinton in key states that could decide their race for the White House.

WASHINGTON/PHILADELPHIA (Reuters) — Voters and civil rights groups reported long lines, isolated cases of malfunctioning equipment and some harassment at polling places in Tuesday's U.S. presidential election, but fears of widespread violence at the polls did not materialize.

WASHINGTON — Republican presidential candidate Donald Trump said on Tuesday he would have to "see how things play out" before accepting the election results, pointing to possible irregularities as he again warned of a rigged political system.