President Donald Trump (R-FL) / Vice President Mike Pence (R-IN) ✓
Fmr. Vice President Joe Biden (D-DE) / Fmr. Mayor Pete Buttigieg (D-IN)
Issues of the day: Iran War, Presidential ethics, Early 2020s Recession (triggered by Russia-Saudi Arabia oil price war)
Here's a possibility. Arguably, without domestic issues for both countries to deal with, these tit-for-tat attacks between the US and Iran had a decent chance of escalating. That's not a guarantee, but a much stronger possibility in this hypothetical.