Do Ted Cruz and Marco Rubio believe we can raise defense spending without cutting elsewhere?

Seems like a reasonable plan if you want more defense spending but also care about our deficit and debt picture.

Senators Marco Rubio and Ted Cruz, though, who presumably want more defense spending and care about the debt, voted against the amendment. May I ask why? Do they have an objection to offsetting defense spending increases, or do the have an objection to these particular cuts? If it’s the latter, where are the spending cuts of their own?

Both men will likely end up running for president, and if elected, they would have to take real, tough steps to put the country on a sound fiscal path. Are they not willing to do that even now?