a heartbeat from

heartbeat (away) from being (something)

In a position to move into a position immediately upon the absence of one's superior or predecessor (often assumed to mean from death). The position of vice president may not seem important, but whoever it is will be a heartbeat away from being president, so we should take that into account when voting.
See also: being, heartbeat
Farlex Dictionary of Idioms.

a heartbeat (away) from

very close to; on the verge of.
See also: heartbeat
Farlex Partner Idioms Dictionary
See also:
  • a heartbeat away
  • a heartbeat away from being
  • heartbeat
  • heartbeat (away) from being (something)
  • jockey for position
  • jockey for position, to
  • jockeying for position
  • have (one's) foot on (someone's) neck
  • at the top of the heap
  • bully pulpit