Another year, another US Pol thread beginneth.
The next few weeks will be critical to whether Trump gets a really clear run at the presidency from the GOP and legal sides (he probably will). If he runs table in Iowa and New Hampshire, which he looks like doing, that probably clears the GOP field for the most part. There's an outside chance that Nikki Haley could, if she comes second in Iowa and wins NH, still be a serious challenger, but that's unlikely.
At the moment Trump is largely outpolling Biden: I suspect that this is largely a result of Biden's polling being depressed among his own side (Israel, general incumbency penalties) while Trump's is buoyant, and that it'll be tighter once partisanship really starts cranking in and people face up to the potential reality of a second Trump presidency.