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u.s. midterm elections and each of the last three u.s. presidents is on the campaign trail to rally voters in hopes of winning power in congress. record heat across the u.s., over 70 high-temperature records are expected to be broken across the country on monday. a surprising admission by iran, how they've helped russia with the war in ukraine, after weeks of denial. live from cnn center, this is "cnn newsroom" with laila harak. they may potentially shift the balance of power in congress after voting. this tuesday, every single seat in the house will be at play while in the s...

us. we are learning the names of some of the top republicans who have testified in multiple investigations involving the former president both in the federal case involving the misuse of classified documents and also the investigation in georgia into the former president's attempt to overturn the election results there. cnn's sara murray joins us now with details. let's start with the fulton county, georgia investigation. who is testifying? >> well, anderson, we have learned that there are two prominent witnesses who have testified before fulton county grand jury. one of them is form...

Russian-supplied enclave, and according to ukrainian military, there are russian military advisers operating in that area, helping the russian separatists. this is inside ukrainian territory. and these separatist and the russian and ukrainian troops have been fighting for the last several years. that's why you see so much damage in this area. and they are still fighting, and they are fighting according to ukrainian troops we've been speaking to, almost on a daily basis with sniper fire, with exchanging of ar tilly and mortars. it is a highly militarized area. there are trenches on this side, s...

People. vulnerable to ar tilly, let alone missiles or rockets or bombs. it's a very difficult situation militarily. we have to have that on the table, but i continue to think we've got to keep working with china. >> there are three other americans, just quickly, three other americans still being held by north korea. do you think otto's death lessens the likelihood that we get them home? >> it's hard to speculate. no one can possibly get into the brain of kim jong-un and understand what his motivations are. i do think, frankly, that it would make sense for our country to say americans can't go ...