Chris Cillizza looks ahead to this year's Senate races while Sarah Lovenheim looks back at what readers had to say about Hillary ClintonHillary Rodham ClintonTrump: Warren is a ‘racist’ Trump looks to raise M by end of June Obama to make clean energy pledge with Mexico, Canada: report MORE's account of her 1996 Bosnia trip. Cillizza moves two Republican-held seats up in his ranking of the 10 seats most likely to change hands. Sens. John Sununu (R-N.H.) and Ted Stevens (R-Alaska) face challenges that are getting tougher, while Sen. Mary LandrieuMary Landrieu oil is changing the world and Washington Ex-Sen. Kay Hagan joins lobby firm Republican announces bid for Vitter’s seat MORE's (D-La.) Republican opponent has yet to show "real progress." Lovenheim highlights several posts from readers who see Clinton's misstatements about her trip as a "major blunder." They note that it under cuts her "experience" argument.