Horowitz's report says just the opposite of that.
That is the case. He said the evidence met the threshhold to investigate.
Horowitz found nothing whatsoever to support that lie.
What "lie?" Horowitz said there were numerous mistakes in how the FBI went about its business.
Barr is noting that the mistakes seemed to only work in one direction.
It is illegal for a President to order a politically motivated investigation especially in an election year of a political opponent.
Hello! That is what happened in 2016. Trump was investigated. We just had a report on it.
Meanwhile, we still have Biden on tape saying what he said. And we still have H Biden working where he had worked.
This is what dictators do to stay in power. Such an candidate could be investigated if the DoJ determines that candidate may be doing something illegal--i.e., the reason the Trump campaign was properly investigated in 2016.
Trump said in the transcript he would have Barr coordinate with Zelensky's people. That should satisfy the DOJ end of the concern.
But on top of that it is illegal for any candidate, incumbent president or challenger--to solicit a foreign nation to provide any "thing of value" to that candidate. The only reason I can think of for Trump supporters refusal to understand that very clear situation is a cult mentality.
The failure to not understand that is probably because we all saw Mrs Clinton seek out foreign aid from a foreigner (the UK) who in turn got information from other foreigners (Russians of all people).