From the Legal Times blog:

The National Rifle Association today is dropping King & Spalding as an outside counsel in the wake of the firm's decision last month to withdraw from representing House Republicans in support of the Defense of Marriage Act. The NRA's action follows a similar decision last week by Virginia Attorney General Ken Cuccinelli to end the commonwealth's relationship with the firm.

In a letter dated today [May 2nd] to King & Spalding chairman Robert Hays, NRA general counsel David Lehman said the firm's decision was "indefensible" but emphasized that the NRA's action in dropping King & Spalding is "not motivated by any position on the statute itself." The NRA is a "single issue organization" focused on the Second Amendment, Lehman wrote. But he said that in retaining outside counsel, "we expect them to zealously advocate for our interests and not abandon the representation due to pressure from those who may disagree with us."

The Legal Times also reproduces NRA's letter.