New York, Dhu-AlHijjah 8, 1436, Sep 22, 2015, SPA -- Republican Governor Scott Walker of Wisconsin plans to drop out of the 2016 presidential race, a Republican source familiar with the decision said on Monday, in a precipitous collapse from serious contender to poor showings in opinion polls, Reuters reported. Walker's campaign announced he would hold a news conference in Madison, the Wisconsin capital, at 6 p.m. ET (2200 GMT) on Monday, but it did not say what he would discuss. His campaign did not immediately respond to requests for comment. But a source familiar with his plans said Walker planned to exit the race for the nomination to represent the party in the November 2016 election. -- SPA 00:39 LOCAL TIME 21:39 GMT www.spa.gov.sa/w