Schlaf is right, it's a made-up quote very loosely based on Cicero's Second Oration against Cataline. Here's the original: [2.11] Quibus ego confido impendere fatum aliquod, et poenam iam diu improbitati, nequitiae, sceleri, libidini debitam aut instare iam plane aut certe adpropinquare. Quos si meus consulatus, quoniam sanare non potest, sustulerit, non breve nescio quod tempus, sed multa saecula propagarit rei publicae. Nulla est enim natio, quam pertimescamus, nullus rex, qui bellum populo Romano facere possit. Omnia sunt externa unius virtute terra marique pacata; domesticum bellum manet, intus insidiae sunt, intus inclusum periculum est, intus est hostis. Cum luxuria nobis, cum amentia, cum scelere certandum est.

[2.11] Over whom I am confident some doom, and some punishment long over due, looms for their dishonesty, wickedness, crimes, caprice; what is owed being either already entirely at hand or is certainly approaching. Seeing that, if my consulship is not able to cure these men, let it have destroy them; let it prolong the Republic not for some brief time or other, but for many generations. There is not a nation that we fear, no king who can make war upon the Roman people; everything abroad, on land and sea, is peaceful on account of the valor of one man: civil war remains, there are plots among us; the danger is at home, the enemy is within. We shall fight against extravagance, against folly, against crime.

One can see the very close parallelism, but it's not a direct quote from Cicero, especially as fraudulently expanded to prove current political points.