Prime Minister Benjamin Netanyahu has no serious challenger in the next election, political experts said after he launched the campaign for the 19th Knesset on Tuesday. A poll carried out for Haaretz on Wednesday appears to confirm this.

The poll, conducted by Dialog under the supervision of Professor Camil Fuchs of Tel Aviv University, shows that Netanyahu easily defeats all his possible rivals from the center-left bloc. As far as the public is concerned, Netanyahu is deemed much more suitable for post of prime minister than any of his potential rivals.

At the same time, the Likud-right wing-ultra-Orthodox bloc has increased its strength to 68 Knesset seats, while the center-left bloc has gone down to 52, compared to the blocs' respective strength in the outgoing Knesset and the previous poll.

The candidate with the highest support after Netanyahu is Tzipi Livni, who has retired from political life. However, Livni, who is considering a return to political life, fails to muster more than half of the support attributed to Netanyahu (57 percent - 28 percent ).

Ironically, Livni, who failed as Kadima's leader in the opposition, lost to Shaul Mofaz in the party primaries and was ousted from the political arena by her party members, is the leading opposition candidate.

Kadima members may regret voting for Mofaz as their party leader in March. No wonder many of them are hoping that she or Ehud Olmert will return. Or even both of them.

Support for the remaining potential candidates - former prime minister Ehud Olmert, who hasn't decided yet whether he's throwing his hat in the ring, Atzmaut leader Ehud Barak, Kadima chairman Shaul Mofaz and Labor chairwoman Shelly Yacimovich - is not impressive.

The poll results lead to the conclusion that Netanyahu will be the next prime minister.

The poll, conducted by Dialog, under the supervision of Professor Camil Fuchs of Tel Aviv University, shows that support for Netanyahu is even stronger than it was in the previous poll some two weeks ago. Asked about their satisfaction with Netanyahu's performance as prime minister, 45 percent of the interviewees were satisfied and 45 percent were dissatisfied, marking a 15 percent improvement from the last poll, in which only 38 were satisfied compared to 53 who were not.

The improvement in Netanayhu's position likely results from his presentation at the UN and perhaps from his announcement of early elections.

While the Likud receives a few more Knesset seats and Labor a few less, Yair Lapid is considerably stronger, according to this poll. Ehud Barak's Atzmaut Party does not obtain the minimum required votes to enter the Knesset.

Future polls are expected to examine the repercussions of a party led by Olmert on the political map. However, in view of the right wing bloc's strength, it is hard to imagine Olmert, with or without Livni, attracting enough cross-over votes from the right.

If Olmert joins the campaign, he will no doubt affect the power balance in the center-left bloc dramatically. Yacimovich will weaken, Lapid will weaken even more. Mofaz will probably have to renounce his place as Kadima leader. It is not clear, however, whether this will change the outcome for Netanyahu.