Ukrainian President Volodymyr Zelenskyy has arrived at the White House for meetings with President Donald Trump at a pivotal moment for his country, one that hinges on whether he can persuade Trump to provide some form of U.S. backing for Ukraine’s security against any future Russian aggression. During his trip to Washington, Zelenskyy’s delegation is expected to sign a landmark economic agreement with the U.S. aimed at financing the reconstruction of war-damaged Ukraine, a deal that would closely tie the two countries together for years to come. Zelenskyy insists on firm security guarantees to safeguard his country. There are concerns Trump may broker a peace deal favoring Russia. But U.S. officials argue American investments in Ukraine will inherently enhance its security. Zelenskyy also will meet with U.S. senators while in Washington.