US Vice President Kamala Harris has gained early momentum against Donald Trump as the Democrats' presumptive nominee sharpened attack lines against her Republican rival, a convicted felon. Only two days after President Joe Biden dropped out of the race, Ms Harris opened a two-percentage-point lead over Mr Trump in a Reuters/Ipsos poll conducted on Monday and Tuesday. But will a last-minute change this far into the race be a problem or a boost for the Democrats? Here, host Greg Tanner speaks to The National's Cody Combs to find out what the predictions are for this US election and who looks likely to come out on top.