(Updated: 2:25 p.m.)

The National Republican Congressional Committee is making its first ad buy of the 2014 season with a blitz against seven vulnerable House Democrats.

Sunlight's Ad Hawk, which allows mobile phone users identify the sources of political advertising, picked up new spots aimed at the incumbents overnight. The early ads underscore the already-intensifying battle for the House, which President Barack Obama has vowed to put back in Democratic control. The president is travelling to the West Coast today for a series of fundraisers benefiting the Democratic Congressional Campaign Committee. Read the details on Political Party ...