GRINNELL, Iowa - Sen. John McCain (news, bio, voting record) said Tuesday there is "lingering resentment" among some Republicans because of his primary fight in 2000 with George W. Bush. Those feelings may complicate his decision whether to seek the presidential nomination for 2008, said McCain, R-Ariz. "If I run, and we'll decide that early next year, there's a lot of work to do," McCain said as he began a two-day visit to Iowa, which traditionally holds leadoff caucuses in January of presidential election years. "Here in Iowa there are parts of the party where there's still lingering resentment over...