Like father, like son! Donald Trump sneaks a peek at Melania's ballot paper - before his boy Eric does the same to HIS wife (then breaks the law by tweeting a picture of his voting slip in the booth)

Both Donald Trump and his son Eric were pictured having a sneak peek at their wives' vote casting today, with Donald glancing in Melania's direction (left) as she made her choice in the voting booth and Eric looking over at Lara (right) as she made her choice for president. Eric then caused further controversy by tweeting his ballot paper nomination (inset), an act that's barred in some states. Donald and Melania were booed as they arrived at a Manhattan polling place just before 11 a.m. to cast their votes. The billionaire businessman and his wife were given an uncomfortable welcome in their home city and were met by even louder shouts as they exited Manhattan's Public School 59, just a few blocks from Trump Tower. The reception was unsurprising given Manhattan is typically a Democratic stronghold - although a handful of Trump backers were also on hand to cheer on their nominee.