Mara Liasson

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So in a press conference yesterday before this news broke about Gary Cohn quitting, President Trump was talking up his White House.

(SOUNDBITE OF PRESS CONFERENCE)

The 2018 election cycle has officially begun, with the first primaries being held in Texas on Tuesday.

In every campaign cycle, analysts look at the fundamentals — the political laws of gravity that, in the past, have influenced elections. In 2016, Donald Trump seemed to defy a lot of these laws, and Republicans are hoping they can do the same this year to prevent the hit that the party in power usually takes in a president's first midterm elections.

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