Republican presidential candidate Chris Christie opened the second GOP primary debate by taking shots at former President Donald Trump. Minutes after the debate began on Wednesday, Christie was asked if Trump's populism was to blame for a possible government shutdown.

Republican presidential candidate Chris Christie said Tuesday that the Republican National Committee had blocked a planned joint appearance with rival Vivek Ramaswamy on Fox News.

Republican presidential candidates Vivek Ramaswamy and Chris Christie will appear separately Tuesday during “Special Report,” Fox News’s nightly evening newscast, after being threatened with a ban from participating in future GOP debates if they appeared jointly on the network.