Even if this fails spectacularly, if he really spends $2bn it could have an effect globally on increased demand/manufacturing, and lower prices in $ per kWh for good quality lithium ion batteries.
I may be wrong on this, but as I recall, Vietnam's domestic auto industry exists because they have escalating high tariffs on foreign manufactured cars with certain engine sizes (eg: 35% tariff on foreign made 4 cyl 1.6 L, 40% or more on 2.4L and larger engines, 50% tariff on things with 3.5 to 5L engines). Similar to China.
I may be wrong on this, but as I recall, Vietnam's domestic auto industry exists because they have escalating high tariffs on foreign manufactured cars with certain engine sizes (eg: 35% tariff on foreign made 4 cyl 1.6 L, 40% or more on 2.4L and larger engines, 50% tariff on things with 3.5 to 5L engines). Similar to China.