Walter Shapiro has an interesting takeaway after reading Passage of Power that relates to modern day politics:

“Maybe the difference reflects the bubble wrap surrounding the modern White House, but reading Caro I got the sense that internal Washington battles were more vicious during the 1960s. I am not talking about congressional gridlock and the lack of bipartisanship in 21st-century Washington, but rather the ability to intimidate others — often those in your own party or administration — to get your way. Among contemporary politicians, by the standards set by Johnson and Robert Kennedy (who earned the description ‘ruthless’), only Vice President Dick Cheney seemed a throwback to an earlier era in his ability to use a shiv.”
Taegan Goddard’s Political Wire