Intensive bombardment of Kurdish positions by jets and artillery paves way for offensive; assault comes after Trump on Sunday announced military pullback from the border

Former VP says US president has 'betrayed his nation,' marking a much tougher stance from Democratic White House hopeful who is now neck and neck with Elizabeth Warren in race

Former Israeli ambassador to the US says he no longer thinks Israel can 'bank on' the US intervening if a serious war broke out

As his warplanes attack targets near border, Erdogan says they're eradicating 'threat of terror'; Kurdish spokesman says civilian areas hit, causing 'huge panic'

'USA should never have been in Middle East' president tweets, amid scathing bipartisan criticism for withdrawing forces, and mounting concern in Israel

President tweets that he won't allow ambassador to testify before 'a totally compromised kangaroo court;' Schiff calls move further evidence of obstruction of Congress

President again warns Turkey over incursion and says US continues to support Kurds, who he called 'special people and wonderful fighters,' with money and arms

Suffering backlash from GOP after enabling attack on US allies, president has warned he'll destroy Ankara's economy if it goes too far

US president says he's fulfilling a campaign promise to withdraw from 'endless war' in the Middle East amid pushback

Mitch McConnell becomes most senior lawmaker in Trump's party to oppose withdrawal of US troops from northern Syria