Washington, March 3 : Former US President Donald Trump on Saturday won Missouri's Republican presidential caucus, continuing his march toward the GOP nomination.

Trump's victory over former US Ambassador to the United Nations, Nikki Haley, in the midwestern state was another piece of good news for the former President, who previously won Iowa, New Hampshire, Nevada and South Carolina.  In Michigan, a key swing state, Trump won the Republican primary on Tuesday, garnering more than 68 per cent of the vote, Xinhua news agency reported. 

On Saturday, he was awarded more delegates during a Republican convention, cementing his victory in the northern state. 

Trump, who has already collected more than 100 delegates in the contests so far, will need to attain at least 1,215 delegates to clinch the Republican presidential nomination. 

Super Tuesday, the day in the presidential primary cycle when most states vote, is fast approaching. It's typical for nearly one-third of all delegates to the Republican or Democratic conventions to be distributed on this day. This year's Super Tuesday falls on March 5, when some 15 states and one territory will vote.