Politics: The election is in 100 days. Here’s what we know.

Do U.S. voters prefer optimistic politicians? Here’s what we found.; Senators rap Energy Dept. for enabling contractor retaliation against whistleblowers; Trump is the first modern Republican to win the nomination based on racial prejudice; What we know about Donald Trump and his taxes so far; Koch network seeks to defuse donor frustration over Trump rebuff; Sanders surrogate weighing Green Party run for vice president; Republicans denounce Trump as confrontation with Muslim parents escalates; In clash between Trump and the Khans, new signs of a cultural and political divide; In Ohio, Clinton warns voters not to be ‘misled’ by Trump; Khizr Khan calls Trump a ‘black soul’ and says McConnell, Ryan have ‘moral’ obligation to repudiate him; On Rust Belt bus tour, Clinton casts the election as a referendum on Trump; Charles Koch won’t back Trump but calls the idea that he would support Clinton ‘blood libel’; Clinton headed to Nebraska, which could provide exactly 1 of 270 electoral votes; Julian Assange won’t say whether a foreign government was involved in DNC email leak;   The most important politics stories today   Dsk / AFP/Getty Images The election is in 100 days. Here's what we know. Trump will remain impetuous, Clinton will remain cautious and the tenor will remain nasty. By Chris Cillizza  •  Read more » Do U.S. voters prefer optimistic politicians? Here’s what we found. The Republican and Democratic parties' conventions offered sharply different visions. Which one is likely to help in November? By Neil Malhotra and Yotam Margalit  •  Monkey Cage  •  Read more »   Senators rap Energy Dept. for enabling contractor retaliation against whistleblowers "The Department of Energy's continued failure to protect whistleblowers from retaliation has tapped the last of our patience." By Joe Davidson | Columnist  •  PowerPost  •  Read more »   Trump is the first modern Republican to win the nomination based on racial prejudice Trump took the Republican Party's implicit racial appeals and made them explicit. By Michael Tesler  •  Monkey Cage  •  Read more »   ADVERTISEMENT   What we know about Donald Trump and his taxes so far Trump paid zero taxes in at least five years in the 1970s, 1980s and 1990s. By Michelle Ye Hee Lee  •  Fact Checker  •  Read more »   Koch network seeks to defuse donor frustration over Trump rebuff At the time of its greatest reach, the operation tries to explain why it is holding back By Matea Gold  •  Read more »   Sanders surrogate weighing Green Party run for vice president By David Weigel and John Wagner  •  Post Politics  •  Read more »   Republicans denounce Trump as confrontation with Muslim parents escalates Dispute between Trump and Khizr and Ghazala Khan has overtaken the presidential race By Katie Zezima  •  Read more »   In clash between Trump and the Khans, new signs of a cultural and political divide For some, but not for all, Khizr Khan's speech was a lesson on patriotism and national identity. By Marc Fisher  •  Read more »   In Ohio, Clinton warns voters not to be ‘misled’ by Trump She warned that Trump poses a "serious threat" to American democracy. By Abby Phillip  •  Post Politics  •  Read more »   Khizr Khan calls Trump a ‘black soul’ and says McConnell, Ryan have ‘moral’ obligation to repudiate him The father of an Army captain killed in Iraq is continuing to speak out against Trump. By Katie Zezima  •  Post Politics  •  Read more »   On Rust Belt bus tour, Clinton casts the election as a referendum on Trump She and running mate Tim Kaine mentioned the Republican nominee almost as much as they spoke of themselves. By Anne Gearan  •  Read more »   ADVERTISEMENT   Charles Koch won’t back Trump but calls the idea that he would support Clinton ‘blood libel’ Koch has been under pressure from fellow donors to engage his network on behalf of Trump. By Matea Gold  •  Post Politics  •  Read more »   Clinton headed to Nebraska, which could provide exactly 1 of 270 electoral votes Local Democrats say her visit will be the first during a general election for their party since FDR. By John Wagner  •  Read more »   Julian Assange won’t say whether a foreign government was involved in DNC email leak "We don't give any material away as to who our sources are," he said. By Michelle Ye Hee Lee  •  Post Politics  •  Read more » Recommended for you   5-Minute Fix Keeping up with politics is easy now, three days a week. Sign Up »         Share Politics:       Twitter      Facebook Trouble reading? Click here to view in your browser. You received this email because you are signed up for Politics PM. For additional free newsletters or to manage your newsletters, click here. We respect your privacy. If you believe that this email has been sent to you in error or you no longer wish to receive email from The Washington Post, click here. Contact us for help. ©2016 The Washington Post, 1301 K St NW, Washington DC 20071