Republican presidential hopefuls are trying to adopt firm defence and security positions without alienating the more insular Trump-influenced base.
There are several impressive contenders – although the former president is likely to make a return too.
Here are snapshots from four of them: Michigan, Arizona, Florida and Pennsylvania. Biden leads in all four, but these are early days.
Republican presidential hopefuls are trying to adopt firm defence and security positions without alienating the more insular Trump-influenced base.