If you’re not a billionaire and you don’t watch where and how you spend, once your tank runs dry, its over.
Walker simply didn’t realize that money will only take you so far and Trump is nowhere near even spending money to remain in contention.
Trump doesn’t need to because he is already famous. For Walker, having the country get on aboard with him was a struggle.
Between the brand and an unknown name, it was simply no contest.
Thing tho is, he didn't raise enough hard campaign cash. Most of his money was SuperPAC money, which you can't use to pay your campaign staff and general campaign costs.