Howard Gleckman says it "is about nothing more than naked politics":
[A]ny lawmaker who voted for the budget deal that funds the remainder of this fiscal year or who opposed the measure because it cut spending by too much ought to be impeached if he does not also vote to increase the debt limit. That politician has voted for a budget that will result in about $3.7 trillion in spending and about $2.2 trillion in revenues. In other words, that pol has voted to add $1.5 trillion to the debt (or at least that fraction of $1.5 trillion necessary to get the government through the remainder of the budget year). Having voted to run up the bill, it is utterly irresponsible to prohibit the government from borrowing the money to pay it.