Retired Gen. Colin L. Powell said he will not seek the Republican presidential nomination or any other office in 2000, lacking "the passion" for political life. "I went through this in 1995. I took a hard look at myself and took a look at the needs of my family and I concluded individually and we concluded as a family that political life was not for us," Powell said in Des Moines. Powell is heading President Clinton's national volunteerism effort. Republicans, however, still refuse to count him out.