An interesting battle is brewing in the Senate.

President Obama placed his political capital on the line Monday and reiterated his threat to veto a military spending bill unless the Senate removed $1.75 billion set aside to buy seven additional F-22 fighter jets.

Mr. Obama stepped up his campaign after liberal Democrats like Senators Edward M. Kennedy and John Kerry of Massachusetts said they supported the purchases, arguing that the program would retain high-paying jobs in many districts nationwide.

The F-22, the world’s costliest fighter jet, is the most prominent weapons system that Mr. Obama wants to cancel or cut in his plan to rein in military spending. A vote by the Senate to keep producing the plane would be an embarrassing setback for him.

Obama’s argument is simple – the military doesn’t need or want more of these planes. Ironically, one of his allies here is John McCain, who deserves credit for his never-ending battle against wasteful military spending.

From a purely political point of view, Obama might welcome this fight, even if an initial loss in the Senate occurs. Obama needs to show he’s willing to get tough on spending, and a veto here would send a strong message.