pandas new column if statement

I have a data frame for which I would like to add a column value using an if statement. I have been trying a lambda function but have not had luck. I want to add a column that says if threshold< order, then set new column to threshold else set column to order.

df_new

  Order       Threshold  
 20,000        100,000
 500,000       50,000
 100,000       75,000

I tried:

 df_new['New Column'].apply(lambda x: df_new['Threshold'] if < df_new['Order'] else df_new['Order Quantity'])