Unlike Dewhurst and Leppert, Cruz does not possess the kind of personal wealth to supplement his fundraising with a heavy personal investment. With the primary more than three weeks away, it's unclear how much money Cruz will be left with in the campaign's final weeks -- and whether it will be enough to sustain an effective broadcast television campaign.
That said, help could be on the way for Cruz. Many of the conservative outside groups that have endorsed Cruz are currently focused on Treasurer Richard Mourdock's challenge to Sen. Richard Lugar in Indiana's May 8 GOP primary. Don't be surprised to see some of these organizations shift their attention to Cruz after May 8 -- and perhaps run some broadcast ads on his behalf.