what does "And the usual nuts were abroad. " mean?
【The President removed his coat and soggy shirt and sat in the rocker, leafing through a pile of newspapers. Jackie retired. Toward the end of die flight from San Antonio she had read a magazine while her husband napped, and now she dozed in her room while he, stripping to his shorts, reworked tonight's speech. Aides ducked in and out. Mac Kilduff brought Texas anecdotes which Sorensen and Bill Moyers had telephoned him. The President considered them and rejected them; he could do better himself. Powers had touched base with the local politicians; for once they were happy. O'Donnell had agreed to bring in a group photograph of schoolchildren for a Presidential autograph. And the usual nuts were abroad. At 6:34 p.m. an eccentric telegram of support arrived from a man who described himself as a former Catholic altar boy who had become a Protestant minister and chairman of his Masonic lodge. He asked that his wire be read "on the air tonight."】