Scott Walker has announced his bid for the United States Republican presidential nomination.<br /><br /> The two-term governor of Wisconsin is the clear favourite of many more conservative voters, but far less with the moderates who account for the majority of the party, according to polls.<br /><br /> More than a dozen Republicans and a handful of Democrats have announced they are running for their party’s 2016 presidential nomination.<br /><br /> Walker supporters said they admire his taking on public-sector labour unions.<br /><br /> On the other hand, he is a Washington outsider, and several strategists have voiced doubts over how the 47-year-old son of a minister has handled questions on evolution, religion and foreign policy.
