Midgam conducted a poll of 510 people with a 4.4% margin of error for Channel 13 that was broadcast on Dec 30 2018.

Current Knesset seats in [brackets]

28 [30] Likud
14 [-–] Israel Resilience (Gantz)
12 [13] The Joint (Arab) List
12 [11] Yesh Atid
09 [24] Zionist Union
07 [06] Yahadut Hatorah/UTJ
06 [10] Kulanu
06 [07] Shas
06 [05] Meretz
06 [03] Hayamin Hehadash (Bennett & Shaked)
05 [05] Yisrael Beitenu
05 [01] Gesher (Orly Levy)
04 [05] Bayit Yehudi
00 [–-] Yaalon, Zehut, Green Leaf, Yachad, Ofek Chadash (as other) under 3.25% threshold

62 [66] Current Right-Religious Coalition+Y.B.
58 [54] Current Center-Left-Arab Opposition+Gantz-Y.B.

Scenario Poll: Gantz+Yaalon together

Current Knesset seats in [brackets]

27 [30] Likud
16 [-–] Israel Resilience (Gantz+Yaalon)
12 [13] The Joint (Arab) List
12 [11] Yesh Atid
08 [24] Zionist Union
07 [06] Yahadut Hatorah/UTJ
06 [10] Kulanu
06 [07] Shas
06 [05] Meretz
06 [03] Hayamin Hehadash (Bennett & Shaked)
05 [05] Yisrael Beitenu
05 [01] Gesher (Orly Levy)
04 [05] Bayit Yehudi
00 [–-] Zehut, Green Leaf, Yachad, Ofek Chadash (as other) under 3.25% threshold

61 [66] Current Right-Religious Coalition+Y.B.
59 [54] Current Center-Left-Arab Opposition+Gantz-Y.B.

Who do you prefer for Prime Minister?

36% Netanyahu, 29% Gantz, 24% Neither, 11% Don’t know