In respect to the Trump vs FBI investigations scandal, analysts at Nomura explained that this issue is unlikely to be resolved anytime soon, but impeachment risk seems low.
"For Bill Clinton, the impeachment trial took three months (plus investigation time) and ultimately failed to pass the Senate."
"We are likely to be in limbo for some time, and evidence is unlikely to provide definitive backing for impeachment at this stage."
"Removing Mr Trump will require a two-thirds majority in the Senate, and the chances of Republicans voting to impeach their own president seem low."
"This means that any resulting increase in implied volatility and risk-aversion is likely to only be temporary."
"There is also the potential for the story to subside if the new FBI director pursues the Russia angle more aggressively."