Republican Rep. Ken Buck of Colorado‚ a hardline conservative who has clashed with his own party at times‚ announced on Tuesday that he will leave Congress at the end of next week. Buck criticized dysfunction on Capitol Hill in discussing his decision to leave‚ telling CNN’s Dana Bash‚ “It is the worst year of the nine years and three months that I’ve been in Congress and having talked to former members‚ it’s the worst year in 40‚ 50 years to be in Congress. But I’m leaving because I think...