The Democratic Party’s sweeping victory in the 2026 US midterm elections has delivered a fresh political setback to Israeli Prime Minister Benjamin Netanyahu, intensifying concerns about Israel’s relationship with Washington and raising questions about his future as the country struggles to form its next government. Democrats captured control of both the Senate and the House of Representatives in Tuesday’s election, turning the result into a major rebuke of President Donald Trump and his administration’s policies, including its support for the unpopular US Israeli war on Iran.

For Netanyahu, the political consequences extend well beyond Washington. Israeli opposition leaders have seized on the Democratic victory to argue that his leadership has damaged Israel’s traditionally bipartisan support in the United States. They believe the changing political mood in America could make it harder for Israel to rely on the same level of support from both major parties that it has enjoyed for decades.

Yair Golan, leader of Israel’s centre left Democrats party, described the American election results as evidence that Netanyahu had become politically damaging to Israel across party lines. Opposition leader Yair Lapid also argued that Israel could not afford to keep Netanyahu in office. Their comments reflect a growing effort to connect the prime minister’s domestic political record with the country's changing international position.

The Democratic gains have also drawn attention to the election of candidates who have openly criticised Israeli government policies. Abdul El Sayed’s victory in Michigan and the success of other progressive candidates, described by political observers as mini Mamdanis, underline the influence of a younger and more critical Democratic political movement. Their positions suggest that unconditional political support for the Israeli government is becoming a more contested issue within the Democratic Party.

The issue has become particularly sensitive because of the conflict with Iran. Public frustration over the war, its economic consequences and the Trump administration’s handling of the crisis contributed to the Republican Party’s poor performance. Democratic candidates gained ground in traditionally Republican states, including Texas, South Carolina, Iowa and Kansas. The results demonstrated that dissatisfaction with the administration had spread beyond the usual Democratic strongholds.

The victories also included significant gains for candidates challenging established political positions on Israel. Abdul El Sayed’s election in Michigan has attracted particular attention because of his criticism of Israeli government policies. The emergence of progressive politicians with similar positions could influence future debates over military assistance, diplomatic backing and Washington’s approach to the Middle East.

For decades, support for Israel has enjoyed backing from both Democrats and Republicans in Congress. That bipartisan consensus has been a major diplomatic advantage for successive Israeli governments. However, growing divisions within the Democratic Party, particularly among younger voters and progressive lawmakers, have raised questions about whether that political arrangement can continue unchanged.

The new Democratic majority could create difficulties for Netanyahu if Congress begins demanding greater scrutiny of American military assistance and US involvement in regional conflicts. Democratic lawmakers could also push for hearings and investigations into the administration’s foreign policy decisions. However, a change in congressional control does not automatically mean an immediate shift in American policy towards Israel. The White House continues to control major aspects of US foreign policy, while the president retains significant authority over diplomatic and military decisions.

The political pressure comes at a difficult moment for Netanyahu at home. Israel's parliamentary election last week produced an inconclusive result, leaving neither major political bloc with enough seats to form a government independently. Netanyahu's Likud party secured 27 seats, while his political allies collectively won 53 seats in the 120 member Knesset. The opposition bloc led by former military chief Gadi Eisenkot secured 48 seats. Arab led parties won a combined 19 seats, giving them a potentially decisive position in negotiations.

Although Netanyahu's coalition remains the largest political bloc, it has lost its parliamentary majority. The result has weakened his position without providing Eisenkot with an easy route to power. The opposition must convince smaller parties or secure sufficient support from Arab led factions to reach the 61 seats required for a parliamentary majority.

President Isaac Herzog received the certified election results on Wednesday, November 4, and began consultations with representatives of political parties. He is expected to decide which candidate has the strongest possibility of forming the next government after completing discussions on Wednesday and Thursday.

The certification also dealt a setback to Netanyahu's claims of possible election irregularities. Israel's Central Elections Committee reported that its examination found no evidence of fraud that compromised the election results. Officials maintained that the certified figures accurately represented voters' choices, despite allegations raised by Netanyahu and his supporters.

The coming coalition negotiations could determine whether Netanyahu retains power, Eisenkot manages to assemble a government or Israel faces another election. The opposition has an opportunity to build a governing arrangement, but disagreements over cooperation with Arab led parties could complicate those efforts.

Netanyahu's immediate political challenge is therefore twofold. He must secure enough parliamentary support to remain in office while confronting growing criticism of his leadership internationally. The American midterm results have given his opponents another argument against him, particularly as concerns about Israel's relationship with the Democratic Party become more visible.

The long term consequences for US Israel relations will depend on how the new Congress approaches military assistance, the Iran conflict and diplomatic cooperation. For now, the Democratic victory has exposed a widening political divide that Israeli leaders cannot easily ignore. Netanyahu's ability to survive the domestic coalition negotiations may determine his immediate future, but rebuilding bipartisan confidence in Washington could prove a much longer challenge.

Sources: Associated Press, Al Jazeera, The Guardian and The Times of Israel.