In his Monday New York Times column, economist Paul Krugman argued that Trump's bumbling on the issues isn't him being a historically terrible candidate, but merely him "doing a clumsy job of channeling [the] nonsense widely popular in his party."
He noted that the reaction to Trump being the presumptive nominee stirred "amazed horror and horrified amazement" among those in the economics community, given that he's basing his fiscal policies on his own life, on in which "in which he has done very well by running up debts, then walking away from them."
However, Krugman added,
it’s also true that much of the Republican Party shares his insouciance about default. Remember, the party’s congressional wing deliberately set about extracting concessions from President Obama, using the threat of gratuitous default via a refusal to raise the debt ceiling. And quite a few Republican lawmakers defended that strategy of extortion by arguing that default wouldn’t be that bad, that even with its access to funds cut off the U.S. government could “prioritize” payments, and that the financial disruption would be no big deal...