Senior Senate Democrats are objecting to the deal Majority Leader Harry Reid made with Sen. Arlen Specter, saying they will vote against letting the former Republican shoot to the top of powerful committees after he switches parties. Several Democrats are furious with Sen. Reid (D-Nev.) for agreeing to let Specter (Pa.) keep his seniority, accrued over more than 28 years as a GOP senator. That agreement would allow Specter to leap past senior Democrats on powerful panels — including the Appropriations and Judiciary committees. “I won’t be happy if I don’t get to chair something because of Arlen Specter,” said...