Secretary of State John Kerry demanded Monday that Uganda “repeal” its new anti-gay law and warned that the State Department has begun a “review” of U.S. assistance to the impoverished East African nation. “This is a tragic day for Uganda and for all who care about the cause of human rights,” Kerry said in a statement. “Ultimately, the only answer is repeal of this law.” President Yoweri Museveni signed into law on Monday legislation enacting tough prison sentences for homosexual acts, which were already illegal in Uganda. Kerry threatened to cut the more than $400 million the country receives in...