Bernie to Trump voters are an actual phenomenon, and that’s who she was targeting.
Less of a phenomenon than Clinton to McCain voters - and was probably even less of a phenomenon in 2020 than in 2016, because Bernie was building a much less White coalition.
That she was bad at it doesn’t mean she wasn’t operating as a spoiler.
You have to actually spoil to be a spoiler. There're benefits to having more left politicians running - DeBlasio basically just endorsed Sanders' positions, for example. And even Warren helped Sanders in some debates. At some points the benefits are outweighed by the costs (e.g. Warren), but it wasn't the case for Tulsi.
Less of a phenomenon than Clinton to McCain voters - and was probably even less of a phenomenon in 2020 than in 2016, because Bernie was building a much less White coalition.
You have to actually spoil to be a spoiler. There're benefits to having more left politicians running - DeBlasio basically just endorsed Sanders' positions, for example. And even Warren helped Sanders in some debates. At some points the benefits are outweighed by the costs (e.g. Warren), but it wasn't the case for Tulsi.