1. Inflation was caused, in no small part, by the Biden admin's mishandling of covid and the subsequent inflation surge. Remember when Biden and Democrats pushed for ever more stimulus and lockdowns? Remember when they said that inflation was gonna be "transitory" and that FED hikes thus aren't necessary yet?
Likewise, it was under the leadership of the Biden admin that the Western reaction to the invasion of Ukraine was heavy on inflation-fueling economic sanctions and light on weapon supplies.
Speaking of the Ukraine war: losing access to cheap Russian gas hurt the European economies a lot, but is far less of a factor for the North American market.
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2. Your chart is difficult to read. Mine shows fundamentally the same data, but in a much more clear presentation. Fact of the matter is that Trump did a rather bad job on the deficit during his first term, but considering the strong growth which accompanied it, the picture isn't quite as bad. But I have even better, clearer data:
https://i.imgur.com/U2zVOob.pnghttps://fred.stlouisfed.org/graph/?g=1I1icAs you can see, the debt to GDP ratio - which is THE key metric determining the sustainability of the deficit/debt - barely budged during Trump's term, although the nominal debt surged. Like I said, economic growth roughly backed it up until covid hit.
By contrast, once the recovery of the economy post-covid was complete, Biden's term saw an undeniable upward trajectory of the debt to GDP ratio. To put concrete numbers to it: public debt stood at 102.93% of GDP in Q1/2017, when Trump came into office, and stood at 105.78% in Q4/2019, before covid hit. That's a rise of 1.42% per year over Trump's pre-covid term. Biden's final two years in office, which are the ones less affected by covid, saw an increase of the debt to GDP of 3.02% per year.
Trump did rather bad in this regard, yet Biden more than doubled him.
The main root cause of inflation were the world wide covid shutdowns. I don’t blame trump for this, the entire world participated in this and in the us was handled on a state by state basis. It’s what folks thought was the right move at the time. But it’s really disingenuous for folks to blame Biden for the Covid shutdowns that happened before he took office.