Loyalists of former Prime Minister Thaksin Shinawatra won nearly half the seats in Thailand's parliamentary elections Sunday in a striking rebuke to the generals who forced the billionaire populist from power in 2006. The first vote since the coup appeared to be a recipe for continuing political instability: The failure of the pro-Thaksin People's Power Party to capture an absolute majority in the 480-seat lower house of parliament opens the way for his opponents to form a government despite the PPP's substantial mandate. With nearly all votes counted, the People's Power Party - established after Thaksin's Thai Rak Thai Party was disbanded by court order earlier this year - had won 228 seats, according to the state Election Commission. Complete results were due Monday. "I would like to call for all political parties to join us in forming a strong government," PPP leader Samak Sundaravej said at a news conference. "I will certainly be the prime minister." He said Thaksin, who was in Hong Kong, had telephoned to offer his congratulations after hearing the results. The second-place Democrat Party took 166 seats. "If the PPP succeeds in forming the government, the Democrat Party is ready to be in the opposition to protect the people's interest. However, if the PPP fails to form a government, the Democrat Party is also ready to form a government," said Democrat Party leader Abhisit Vejajjiva. The possible disqualification of some Thaksin allies could also complicate the task of assembling a ruling coalition. Sodsri Sathayatham, a member of the Election Commission, said at least 24 could be disqualified while re-elections might be necessary in a dozen cases. The commission, which will meet Wednesday to begin investigations, was barraged by hundreds of complaints of vote-buying and other violations of electoral law. The PPP got most of its support from the rural north and northeast, where Thaksin's programs, including universal heath care and generous village development funds, won a hard-core following. The Democrats ran strongest in Bangkok, where the 2006 movement to oust Thaksin was centered. Only seven parties of 39 running won parliamentary seats. About 60 percent of 45 million eligible voters cast ballots for about 5,000 candidates. If the PPP comes to power, said Nakarin Mektrairat, dean of Thammasat University's Faculty of Political Science, "there will be tension and conflicts," in part because of its lack of support from the capital's residents. Thai politics has been in almost constant turmoil since early 2006, when protests mushroomed demanding that Thaksin step down, despite his party's landslide victory a year earlier giving it an absolute parliamentary majority. An April 2006 election was boycotted by the opposition and later declared invalid by the courts, leaving Thaksin's government in limbo until the September 19 coup last year. But the military-appointed interim government that succeeded it proved weak and indecisive, failing to restore public confidence. Thaksin was abroad at the time of his ouster, and has stayed in exile, legally barred from office, having his party dissolved by the courts, and being charged with a slew of corruption-related crimes. Despite having vowed retirement from politics, he burnished his image from afar, with such moves as the purchase of England's Manchester City soccer club, slyly buying into the sport's popularity in Thailand. Thaksin's PPP allies announced last week that he would return to Bangkok early next year, after a new government is installed. Thaksin did not comment publicly on the election results. Despite its victory at the polls, the PPP will probably face an uphill battle in trying to form a government. The forces that helped unseat Thaksin - the military, Bangkok's educated middle class, and the country's elite, including elements associated with the country's monarchy - have worked hard to erase Thaksin's political legacy. They changed the constitution to limit the power of big parties and sought to demonize him as a corrupt destroyer of democracy. His return could undo their efforts and put their own positions in jeopardy. Samak said that if possible, the PPP would grant amnesty to Thaksin and 110 other executives of his now-disbanded Thai Rak Thai Party, who were barred from office for five years. "They didn't do anything wrong," he said. Thailand's long-term prospects for political stability are poor. PPP leader Samak, a veteran right-wing politician who has served in several Cabinets and as governor of Bangkok, has been a divisive figure for decades. The blunt-speaking 72-year-old Samak "doesn't have a conciliatory personality. He is aggressive and uncompromising," said Narong Phetprasert, an economist at Chulalongkorn University. Critics say Abhisit, 43, British-born and educated at Eton and Oxford, may lack the toughness necessary to keep together a coalition of parties out to get the biggest share of power they can grab. In Washington, the State Department, which had criticized the coup against Thaksin, said it welcomed reports that the polls were held in a free and fair manner and congratulated the Thai people "on taking this crucial step toward a return to elected government." Department spokesman Sean McCormack said the U.S. calls on all sides "to respect the results, and for a fair and transparent process for the adjudication of any disputes or fraud claims."