Not enough info as asked.
That is, before we can answer the question of honesty, it would seem advisable to determine BY WHOSE STANDARDS are we judging honesty?
But just in case that seems a copout, here we go, best estimate from one old cowboy:
1. To a member of the public at large: Perhaps 10 percent in your own party and more like 2 percent in the opposing party seem honest.
2. To a politician, he or she himself almost always seems honest no matter what actions have been taken (we humans can rationalize most anything), perhaps 50 percent of his fellow party members look that way, and maybe 8 percent of the opposition.