In August, President Donald Trump claimed that 97% of Republican candidates he backed had won their primary races.
And it's true that Trump has shown an ability to influence races particularly in Republican primaries, picking off politicians he didn't like such as Sen. John Cornyn, R-Texas, and Rep. Thomas Massie, R-Ky.
But while he hasn't shied away from expressing his opinions on foreign leaders, his influence over other countries' elections is proving less strong.
Brazilian President Luiz Inácio Lula da Silva won reelection on Sunday, defeating Trump-aligned Flávio Bolsonaro, whose father Jair had also been a Trump ally.
Also last weekend, a student-led movement in Serbia defeated the ruling party of Aleksandar Vucic, a populist leader who had cultivated ties with Trump and his circle. Vucic had served as Serbia's president from 2017, and as prime minister from 2014 to 2017.