(Bloomberg) -- Rishi Sunak’s critics on the right of his Conservative Party have set their sights on elections for two open UK parliamentary seats next month as a key moment in their effort to replace him as prime minister.Most Read from BloombergPutin Sends US Signal on Ukraine Talks, Seeing War AdvantageGiuliani Lists Yankees Loot, Trump Claim as Assets in BankruptcyMacKenzie Scott Pares Her Amazon Stake by $10 BillionTrump Ordered to Pay $83.3 Million for Defaming CarrollTrafigura Tanker Carr