Washington, Nov 8 : US president Barack Obama called on voters to reject fear and choose hope on Election Day and presented Democratic party candidate Hillary Clinton as a fighter and a patriot, to be his successor in the White House.

\"I bet men across the country will have no problem voting for the best candidate, who turns out to be a woman,\" Obama said on Monday night at a rally in front of about 40,000 people in Philadelphia in support of Clinton.

Clinton said that the US faces the \"test of our time\", when it chooses between herself and her Republican rival Donald Trump adding that \"We choose to believe in a hopeful, inclusive, big hearted America. An America where everyone has a place, everyone is included,\" Efe news reported.

\"We do not want to sink the vision of this country, we want to make it bigger,\" Clinton said at her grand final rally in Pennsylvania, where she felt that the \"core values\" of the US have been put to the test in these elections.

Clinton insisted she would not allow anyone to destroy the progress achieved in the US under President Obama, who spoke before her speech, and said she was convinced that \"the best days\" for the country are yet to come.

\"I believe with all my heart that our best days are yet to come and that we will reach them together,\" the former Secretary of State said.

\"She will work,\" and \"will not just tweet,\" Obama emphasised in his speech referring to Republican presidential candidate Donald Trump.

Obama also said he was confident that young voters would go to the polls on Tuesday, because their future \"is at stake\" in these elections and said that African-Americans will choose the next president not because of the colour of their skin, but because of the abilities.

The president asked attendees to recall that while Clinton was New York senator and when she served as his secretary of state (2009-2013,) she gained a lot of popularity, even among Republicans, who then considered her work as the head of US diplomacy \"impressive\".

At a star-studded event in Philadelphia, Clinton was joined on stage by celebrities Bruce Springsteen and Jon Bon Jovi as well as her husband Bill, daughter Chelsea and First Lady Michelle Obama.

Clinton and Republican rival Donald Trump on Monday held their penultimate rallies in the battleground states of North Carolina, Pennsylvania and Michigan.

According to the latest Fox New nationwide polls, Clinton is ahead of Trump with a four-point lead.

On Sunday Hillary Clinton\'s campaign received a boost when the Federal Bureau of Investigation said newly discovered emails sent by an aide showed no evidence of criminality.

A record number of Americans - more than 46 million - have voted early by post or at polling stations.

Obama backs Clinton in last campaign rally