Republican presidential candidate Ron Paul will end his campaign Thursday night and announce a new effort to help elect libertarian-leaning Republicans to public offices around the country. Campaign spokesman Jessee Benton said the announcement, expected during a speech outside the Texas Republican convention in Houston, was "not a disappointment at all. I think this is really exciting." Paul's announcement will be a formality. The 72-year-old Texas congressman won few delegates during the Republican primaries. But he raised millions of dollars online and developed a large, grass-roots following among those who backed his call for an end to the war in Iraq and smaller government at home. Paul has said he won't endorse Sen. John McCain, the likely GOP presidential nominee. Benton said that was unlikely to change.