Rosenberg: Trump abandons carrot and wields stick over Putin in Ukraine talks

President Trump has shifted from a more diplomatic approach to imposing sanctions on major Russian oil companies amid frustrations over Ukraine talks. The cancellation of a US-Russia summit in Budapest reflects the dwindling chances of reaching a compromise with President Putin. However, Russia views the sanctions as an "unfriendly act," with former President Dmitry Medvedev suggesting it signals the path to war with the US. Trump's change in tactics signifies a move from carrots to sticks in dealing with the Kremlin's reluctance to make concessions in the conflict.