The navy, essential to the projection of US power globally, will fight to retain its current complement of 11 aircraft carriers, but success is by no means certain. The frontrunner for the Republican nomination for November’s presidential election, Mitt Romney, has made an issue of the navy’s size, arguing it is at its smallest since 1917 and promising to build 15 ships a year. However, many defense analysts argue his plan is unaffordable without deep cuts in the army and air force, given Republican demands to cut government spending. So far, the Romney campaign has not specified how his administration might pay for expansion of the navy.